Monitoring adult Eretmocerus mundus, Encarsia lutea and Bemisia tabaci with yellow sticky traps in cotton Gossypium hirsutum

Abstract:  The efficiency of yellow sticky traps for estimating adult population dynamics of Bemisia tabaci (Genn.) (Hom., Aleyrodidae) and its parasitoids Eretmocerus mundus Mercet, Encarsia lutea (Masi) (Hym., Aphelinidae) was examined in cotton in choice and no-choice studies in Çukurova, Turkey in 2004 and 2005. In the no-choice study, traps were suspended individually on the third, fifth or eighth main stem node branches from the tops of cotton plants. For the choice study, three traps were suspended on the same individual node branches on different plants. Trap captures were counted weekly. Mean (±SE) numbers of B. tabaci captured on traps were higher in no-choice (max.: 697.8 ± 55.6) compared with choice (max.: 533.3 ± 47.4) studies each year. Population fluctuation patterns of E. mundus and E. lutea adults were similar to those of adult B. tabaci on traps with low weekly mean numbers occurring initially and increasing to peak levels in mid-August, then decreasing in later weeks of the studies. The relationship between weekly mean numbers of B. tabaci and E. lutea was greater than the relationship between B. tabaci and E. mundus . Mean numbers of E. mundus and E. lutea on traps were higher at the third main stem nodes than traps suspended on the fifth or eighth node. Mean numbers of E. lutea pupae were usually higher than E. mundus from the first sampling date throughout the end of the growing season on leaves. The relationship between parasitoid pupae and adults captured in traps is discussed.     

Monitoring thrips species with yellow sticky traps in astringent persimmon orchards in Korea

Thrips are one of the insect pests of persimmon (Diospyros kaki Thunb.) in the major production areas of astringent persimmon in Korea. We surveyed astringent persimmon orchards in the Damyang, Sangju and Cheongdo regions of Korea to determine thrips species composition and abundance. Orchards sprayed with either organic or conventional pesticides were sampled over the course of one flowering season, using yellow sticky traps to determine if this is a suitable method for monitoring thrips populations, and to determine thrips species composition and abundance. Eight thrips species were captured on yellow sticky traps in both the tree canopy and ground cover: Ponticulothrips diospyrosi Haga et Okajima, Scirtothrips dorsalis (Hood), Frankliniella occidentalis (Pergande), F. intonsa (Trybom), Thrips tabaci (Lindeman), T. hawaiiensis (Morgan), T. coloratus (Schmutz) and T. palmi (Karny). In all regions, F. occidentalis and F. intonsa dominated in both organic and conventional orchards. S. dorsalis, F. occidentalis, F. intonsa and T. hawaiiensis were found in persimmon flowers, with S. dorsalis the dominant thrips. Significantly more S. dorsalis were captured from flowers in the lower and middle canopy than in flowers from the upper canopy. Fruit damage was also significantly higher in fruit from the lower canopy than in fruit from the middle and upper canopy.     

黄板、黄盆及灯光对麦长管蚜和禾谷缢管蚜的诱捕效果

通过黄板、黄盆及灯光的监测,研究了其对麦长管蚜Sitobion avenae(Fabricius)和禾谷缢管蚜Rhopalosiphum padi(L.)诱捕作用,结果表明2种麦蚜对黄盆的趋性最好,黄盆诱捕量分别为黄板诱捕量的7.94、2.13倍。黑光灯和荧光灯对2种麦蚜的诱捕作用比较试验表明,黑光灯对2种麦蚜的诱捕效果较好。黄盆和黑光灯2种监测手段的结合能够为预测预报提供准确可靠、适时的测报结果。     

黄色粘板对小麦蚜虫及其天敌的诱集作用

为明确黄色粘板对小麦蚜虫及其天敌的诱集作用,2010和2011年,在中国科学院河北栾城县农业生态系统试验站,通过在小麦田间悬挂黄板,对其诱杀小麦蚜虫效果及对小麦蚜虫天敌的影响进行了调查统计分析。结果表明,当地悬挂的黄板可以诱杀7目30余种昆虫,优势种是蝇类,而非小麦蚜虫。悬挂区内不进行化学防治时,黄板诱杀蚜虫数量与其相应百株虫量之间呈显著的线性相关,进行化学防治时,两者之间的线性相关不显著。黄板可以诱杀多种小麦蚜虫的天敌,灌浆期前后,黄板诱集到的益害比都大于1,最高可达45.50。在综合考虑黄板对小麦蚜虫及其天敌的诱杀作用,以及可能影响黄板诱集效果的气象条件后,初步结论是在河北栾城及周边地区,黄板可用于早期迁入小麦有翅蚜的监测,但不适合防治小麦穗期的蚜虫。     

Control of Dacus oleae by yellow sticky traps combined with ammonium acetate slow-release dispensers

In an isolated olive grove of approximately 350 trees, one yellow sticky trap combined with an ammonium acetate slow-release dispenser was hung in every tree of the large fruit varieties at the end of June or beginning of July for 3 consecutive years. In September, when small fruit varieties were becoming suitable for Dacus oleae (Gmelin) infestation, similar traps were also hung in all trees of these varieties, and the traps in the large fruit trees were replaced by new ones. All traps were removed at the end of December or in January, when harvest of the olive crop was completed. The olive fly population was low in the 1st year, while in the 2nd and 3rd it was high and very high, respectively.In the 1st year, the infestation in the experimental grove was kept very low and was comparable to, or even lower, than the infestation in olive groves treated with insecticides. In the 2nd year, in most cases the infestation was between 15–30%, while in the insecticide-treated groves it remained below 10%. In the 3rd year the infestation reached levels above 80% while in the insecticide-treated groves it reached levels between 30–45%.

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Résumé Un piège gluant jaune associé à un diffuseur libérant lentement de l'acétate d'ammonium, a été suspendu dans chaque arbre d'une variété à gros fruits. L'expérience a eu lieu dans une oliveraie isolée de 350 arbres environ, pendant 3 années consécutives à la fin juin et au début juillet. En septembre, quand les variétés à petits fruits deviennent convenables pour la contamination par D. oleae, des pièges sont suspendus à tous les arbres de ces variétés, les pièges sur les arbres à gros fruits sont alors remplacés. Tous les pièges sont enlevés find décembre ou en janvier, quand la récolte des olives est terminée.En 1982, les températures maximales étaient chaque semaine très élevées de mi-juin à miseptembre (33°C et plus), tandis qu'elles n'étaient atteintes en 1983 et 1984 que de fin juin à mi-août. La population de mouches de l'olive était basse en 1982, tandis qu'elle était élevée en 1983 et très élevée en 1984.La première année (à population faible) l'attaque est restée basse et était comparable ou même plus faible à celle observée dans les oliveraies traitées avec insecticides. La seconde année (population élevée) elle était le plus souvent de 15 à 30% tandis que dans les oliveraies traitées, elle restait inférieure à 10%. La 3è année (population très élevée) l'attaque atteint 80% tandis que dans les oliveraies traitées, elle était de 30 à 45%.

     

Corn rootworm survey in North Dakota and a comparison of two sticky traps

Northern, Diabrotica barberi Smith & Lawrence, and western, D. virgifera virgifera LeConte, corn rootworms are major economic pests of corn, Zea mays L., in the United States. This research was conducted to determine the geographic distribution, abundance, and species composition of Diabrotica species in North Dakota, and to compare effectiveness of unbaited green Scentry™ Multigard and unbaited yellow Pherocon^® AM/NB sticky traps for monitoring. Fifty-one corn fields were monitored using traps from July through October of the 2013, 2014, and 2015 growing seasons for rootworm beetle activity. The overall species composition was 61% D. barberi and 39% D. v. virgifera. Both species were frequently captured, and the highest densities (i.e. >10 beetles per trap per week) were found in southeastern North Dakota. Low densities (i.e. <0.1 beetles per trap per week) of D. barberi were found in areas further north, but no D. v. virgifera were captured in those fields. The two different coloured sticky traps were not significantly different across 38 sites for D. barberi and across 21 sites for D. v. virgifera. However, green Scentry™ Multigard traps captured more D. barberi beetles than yellow Pherocon^® AM/NB traps at 68% of the 38 fields. In contrast, the yellow Pherocon^® AM/NB traps captured more D. v. virgifera beetles at 57% of the 21 fields. Findings also indicated that, although D. barberi was the predominant species in surveyed fields, populations rarely reached the economic threshold. Our study observed that economic populations of corn rootworms were infrequent among the field sites trapped in North Dakota. As a result, producers should scout fields regularly for corn rootworm populations levels to make sound pest management decisions. This knowledge can enable producers to effectively protect their crop when control is economically justified, and the information can also provide input cost savings when populations do not warrant control efforts.     

利用黄板监测烟粉虱及其寄生蜂的种群动态

研究了黄板不同放置高度、不同时间内对日光棚室内番茄上烟粉虱Bemisia tabaci(Gennadius)及其寄生蜂种群的诱集监测效果。结果表明,在同一时间内以黄板上部与植株顶部持平的高度悬挂的黄板对烟粉虱和蚜小蜂的诱集效果最好,其次是以黄板上部与植株中部持平的高度悬挂的黄板,当黄板的底部高出植株顶部30 cm时对烟粉虱及其蚜小蜂的诱集效果最差。在5~10月份,随着季节的变化,同一位置的黄板对烟粉虱及蚜小蜂的诱集数量逐渐增加。调查发现,番茄上烟粉虱的寄生蜂主要为桨角蚜小蜂属EretmocerusHaldeman和恩蚜小蜂属EncarsiaF erster,2个属的蚜小蜂在季节上呈互补之势,因此总体上蚜小蜂对烟粉虱的寄生率在5~10月之间呈不断上升的趋势。     

Evaluation of yellow sticky traps for monitoring the population of thrips (Thysanoptera) in a mango orchard

Populations of several thrips species were estimated using yellow sticky traps in an orchard planted with mango, Mangifera indica L. during the dry and wet seasons beginning in late 2008-2009 on Penang Island, Malaysia. To determine the efficacy of using sticky traps to monitor thrips populations, we compared weekly population estimates on yellow sticky traps with thrips population sizes that were determined (using a CO(2) method) directly from mango panicles. Dispersal distance and direction of thrips movement out of the orchard also were studied using yellow sticky traps placed at three distances from the edge of the orchard in four cardinal directions facing into the orchard. The number of thrips associated with the mango panicles was found to be correlated with the number of thrips collected using the sticky trap method. The number of thrips captured by the traps decreased with increasing distance from the mango orchard in all directions. Density of thrips leaving the orchard was related to the surrounding vegetation. Our results demonstrate that sticky traps have the potential to satisfactorily estimate thrips populations in mango orchards and thus they can be effectively employed as a useful tactic for sampling thrips.     

Suitability of exotic and native lady beetle eggs (Coleoptera: Coccinellidae) for development of lady beetle larvae

Predation upon lady beetle (Coleoptera: Coccinellidae) eggs in the field is most often instances of egg cannibalism by larvae or adults while the majority of the remaining predation events upon coccinellid eggs is done by other species of Coccinellidae. Thus the recent introduction and establishment of Harmonia axyridis in the US could negatively affect native species of Coccinellidae via egg predation. However, little is known regarding the suitability of interspecific coccinellid eggs as a food source for larval development. In this study, it was found that native first or third instar Coleomegilla maculata and Olla v-nigrum larvae were incapable of surviving to the adult stage when provided solely exotic H. axyridis eggs. In stark contrast, H. axyridis larvae survived equally well when cannibalizing eggs or eating eggs of either native species. When C. maculata and O. v-nigrum were grouped as ‘native’ and compared with the exotic H. axyridis, more native eggs were attacked than exotic eggs and a higher percentage of eggs was attacked by H. axyridis larvae. Native and exotic larvae attacked a similar percentage of native eggs but native larvae attacked significantly fewer exotic eggs than did exotic larvae. These data suggest that H. axyridis may prey upon the eggs of these native species, when encountered in the field, compared with the likelihood of the native species preying upon H. axyridis eggs. Therefore, eggs of the native species C. maculata and O. v-nigrum will continue to be subjected to cannibalism and also to possible predation by other native species and the exotic H. axyridis.     

Protocol for semi‐automatic identification of whiteflies Bemisia tabaci and Trialeurodes vaporariorum on yellow sticky traps

Yellow sticky traps (YSTs) are commonly used in greenhouse crops to monitor flying pest species. Whiteflies like Trialeurodes vaporariorum (Westwood) (Hemiptera: Aleyrodidae) and Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) are typically monitored using YSTs in tomato and sweet pepper crops. By counting the whiteflies on a YST, growers get an idea of the pests density in space and time in the greenhouse and can take pest control measurements accordingly. The downside is that manual counting of whiteflies on a YST is very time‐consuming and thus costly. A protocol to semi‐automate counting and identification of whiteflies on YSTs using image analysis software was developed to speed up the monitoring process. Bemisia tabaci is on average smaller than T. vaporariorum and by discriminating by size based on the amount of pixels in digital images, ratios of both species in a mixed population on YSTs could be estimated accurately. At low densities, the countings of different YSTs should be pooled till a 200 density threshold is reached in order to get accurate ratio estimates of both species. This study provides a protocol to reliably count and identify whiteflies semi‐automatically on standardized pictures. More research is required to develop alternative techniques to make standardized pictures in the field (e.g., with smartphone).     

Evaluation of sticky light traps for sampling mosquito larvae

Very simply constructed aquatic sticky light traps employing a chemical solution emitting a bright light attracted large numbers of all larval instars, but few pupae of Aedes cantans in trials in England. During April numbers of larvae per trap ranged from 73±14.2 to 163±19.9, whereas dipping with a ladle yielded only 6.9±5.5 to 11.8±7.7 larvae/dip. The traps were also effective in sampling larvae of Culiseta morsitans and in Sierra Leone larvae of Aedes aegypti. It was concluded that sticky light traps could be valuable in sampling relative numbers of mosquito larvae and merited further evaluation.

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Résumé Des pièges adhésifs lumineux faciles à réaliser sont construits pour les captures des larves de moustiques. Ils sont formés de paires de boîtes de Pétri en plastique contenant une solution émettrice de lumière provenant de bâtons lumineux chimiques Cyalume^®. Chaque piège est recouvert d'une feuille de plastique de 16×16 cm enduite d'une substance qui reste adhésive sous l'eau. Les larves de moustiques attirées vers la source lumineuse viennent se coller à la feuille adhésive.Ces pièges ont été utilisés avec succès en Angleterre pour l'échantillonnage de tous les stades larvaires d'Aedes cantans, mais pas avec le même efficacité pour les nymphes. Des tests plus restreints ont montré que la technique était également utilisable pour les larves de Culiseta morsitans. Les nombres moyens d'A. cantans capturés pendant une piode de 12 h (73±14,2–163±19,9) étaient supérieux à ceux obtenus en plongeant une louche (6,9±5,5–11,8±7,7). En utilisant les pièges adhésifs lumineux, les captures moyennes de C. morsitans étaient également supérieures (12,6±4,7–35,8±8,9) contre (5,7±6,1–8,9±7,8) avec la méthode de la louche.En Sierra Leone, des stades larvaires immatures d'A. aegypti se développant dans des containers de stockage d'eau ont également pu être capturés à l'aide de ces pièges.Bien qu'une évaluation plus poussée soit encore nécessaire, il ne fait aucun doute que ces pièges adhésifs lumineux aient un intérêt considérable pour l'échantillonnage larvaire dans les sites inaccessibles, tels que les trous d'arbres ou les trous de crabes, où les méthodes d'échantillonage classiques sont souvent d'un emploi difficile.

     

Vitellogenin synthesis in the lady beetle Coccinella septempunctata

To elucidate the hormonal mechanisms which regulate reproduction in a beneficial insect, we have begun to investigate the process of vitellogenesis in Coccinella septempunctata, the seven-spotted lady beetle. Vitellin (Vn) constitutes 60–70% of the total protein in C. septempunctata eggs and is composed of four polypeptides with molecular weights determined by electrophoresis in denaturing gels of 133,000, 130,000, 46,000 and 43,000. In the egg these polypeptides occur in a ratio of approx. 1:1:1:2. The two larger Vn polypeptides yielded similar peptide fragments upon partial proteolytic digestion which suggests that they are structurally related. The two smaller Vn polypeptides appear structurally distinct because they yielded unique proteolytic fragments. The Vn precursor, vitellogenin (Vg), was observed in the haemolymph of mature females, but was not detected in the haemolymph of immature females or males. The electrophoretic mobilities, antigenicity, and proteolytic fragmentation patterns of the Vg polypeptides were indistinguishable from those of their Vn counterparts. Thus the major processing of the Vn polypeptides appears to occur prior to their secretion into the haemolymph.The synthesis of Vg was examined in whole animals and in organ cultures. Vg synthesis was observed in the fat body and to a smaller extent in the ovaries of mature females. The newly synthesized Vg was rapidly secreted. Vg synthesis was not detectable in brain or thoracic muscle of mature females or in the fat body of males or immature females. Very little vitellogenin synthesis occurred in female insects reared on artificial diets. The topical application of a juvenile hormone analogue induced Vg synthesis in non-fecund females but not in males.     

Trap height and orientation of yellow sticky traps affect capture of Chaetocnema pulicaria (Coleoptera: Chrysomelidae)

Field studies were conducted in Iowa during 2001 and 2002 to determine the optimal sampling height and orientation for using yellow sticky cards to monitor populations of Chaetocnema pulicaria Melsheimer, the vector of the bacterial pathogen Pantoea stewartii subsp, stewartii, the causal organism of Stewart's disease of corn, Zea mays L.. Sticky cards were placed at five different heights (0.15, 0.30, 0.45, 0.60, and 0.90 m) and three orientations (horizontal, vertical, and 30 degree angle) at three locations (Ames, Crawfordsville, and Sutherland) in 2001 and two locations (Crawfordsville and Johnston) in 2002. No statistical differences were observed among the placement combinations for individual sampling periods or for the total number of C. pulicaria captured in 2001. In 2002, the 0.30 m and vertical cards captured significantly (1.1-35 times) more C. pulicaria than any other placement combination during sampling throughout August at both Crawfordsville and Johnston. Also, the cumulative number of C. pulicaria captured by the 0.30 m and vertical cards was significantly higher than all other placement combinations. This information is important in the development of sampling protocols to aid growers in making management decisions. These management decisions include where and when to apply foliar insecticides during the corn growing season to control C. pulicaria populations, thereby reducing the risk for Stewart's disease of corn.     

A comparison of water traps, cylindrical sticky traps and suction traps for sampling thysanopteran populations at different levels

Thysanoptera drifting over and around a wheat field were trapped using black, green and white water traps, black cylindrical sticky traps and suction traps. Certain Taeniothrips spp., Thrips spp., and Aeolothrips spp. were strongly attracted to white but not to green or black; Limothrips cerealium Hal., Chirothrips manicatus Hal., and Stenothrips gramium Uzel were not markedly attracted to any of these colours. At crop level suction traps gave more consistent catches² than either sticky or water traps; at higher levels, catches from sticky traps were more consistent than those from water traps. Up to 48 ft the aerial density of all species decreased with height but the rapidity of the decrease differed between species.

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Sommaire Les Thysanoptères qui flottaient autour et au-dessus d'un champ de blé étaient attrapés par le moyen de pièges à l'eau noirs, verts ou blancs, de pièges cylindriques qui étaient visqueuz et noirs et d'aspirateurs. De certaines espèces des genres Taeniothrips, Thrips et Aeolothrips étaient très attirées par le blanc mais pas par le vert ni le noir: les espèces Limothrips cerealium Hal., Chirothrips manicatus Hal., et Stenothrips gramium Uzel n'étaient pas notablement attirées par chacune de ces couleurs. Au niveau des épis les données obtenues avec les aspirateurs étaient plus justes que ne l'étaient celles obtenues avec les pièges à glu ou les pièges à eau: plus haut les pièges à glu indiquaient des données plus justes que les pièges à eau. Jusqu'à quinze mètres environ de hauteur la densité aérienne de toutes les espèces diminuaient progressivement, mais la rapidité de la diminution était différente entre les espèces.

     

Demographic attributes of an introduced herbivorous lady beetle

Demographic attributes of the adults of an introduced herbivorous lady beetleEpilachna niponica (Coleoptera: Coccinellidae) were investigated from 1975 to 1981 in the Botanical Garden of Kyoto University. Population growth rate varied from 4.8 to 16.8 throughout the study period. Fecundity and mortality in the late larval period contributed most to annual changes in the population growth rate. Population growth rate was negatively correlated with the density of overwintering adults. Adult survival from emergence to the reproductive season, which varied from 0.03 to 0.36 throughout the study, was almost completely determined by survival during the pre-hibernation period. Adult survival to the preproductive season changed in a size- and sex-dependent manner. Larger adults survived better than smaller individuals; male-biased mortality occurred from adult emergence to the reproductive age. Severe intraspecific competition among late instar larvae due to host plant defoliation produced a higher proportion of small-sized adults, resulting in lower adult survival to hibernation. The introduced population had a higher population growth rate and a lower adult survival to the reproductive season than the source population.     

Response of Trichogramma egg parasitoids to colored sticky traps

The response of Trichogramma spp. egg parasitoids to colored sticky traps was evaluated in the field during two seasons (1995/1996, 1996/1997). Traps consisted of a glass tube coated with Bird-Tanglefoot® into which colored paper was inserted or clear traps without paper. Colors tested were white, green, blue, yellow and red in the first season and white, green, yellow and black in the second season. The proportion of both female and male parasitoids caught on the sticky traps was significantly different among colors, indicating that the parasitoids actively move between plants and are not solely carried along passively by wind. White was the color most preferred by female parasitoids, followed by clear and green traps. Yellow was preferred over black but was less attractive than green. Visual cues may be used by Trichogramma spp. during the habitat location process. The color preference of male Trichogramma spp. differed significantly from females with yellow and green being more attractive than white. For all colors, more female Trichogramma spp. were caught on the sticky traps (>85% of all wasps caught), indicating a lower activity level and/or shorter lifespan for males. The use of white cylindrical sticky traps for monitoring Trichogramma spp. populations in the field is recommended.     

Intercrop movement of convergent lady beetle,Hippodamia convergens (Coleoptera: Coccinellidae), between adjacent cotton and alfalfa

A 2‐year study was conducted to characterize the intercrop movement of convergent lady beetle, Hippodamia convergens Guerin‐Meneville (Coleoptera: Coccinellidae) between adjacent cotton and alfalfa. A dual protein‐marking method was used to assess the intercrop movement of the lady beetles in each crop. In turns field collected lady beetles in each crop were assayed by protein specific ELISA to quantify the movement of beetles between the crops. Results indicated that a high percentage of convergent lady beetles caught in cotton (46% in 2008; 56% in 2009) and alfalfa (46% in 2008; 71% in 2009) contained a protein mark, thus indicating that convergent lady beetle movement was largely bidirectional between the adjacent crops. Although at a much lower proportion, lady beetles also showed unidirectional movement from cotton to alfalfa (5% in 2008 and 6% in 2009) and from alfalfa to cotton (9% in 2008 and 14% in 2009). The season‐long bidirectional movement exhibited by the beetles was significantly higher in alfalfa than cotton during both years of the study. The total influx of lady beetles (bidirectional and unidirectional combined) was significantly higher in alfalfa compared with that in cotton for both years. While convergent lady beetles moved between adjacent cotton and alfalfa, they were more attracted to alfalfa when cotton was not flowering and/or when alfalfa offered more opportunities for prey. This study offers much needed information on intercrop movement of the convergent lady beetle that should facilitate integrated pest management decisions in cotton utilizing conservation biological control.     

Determination the population trends of cereal aphids and associated parasitoids by yellow sticky traps with reference to aphid management on wheat

Population trends of cereal aphids and their associated parasitoids inhabiting wheat plantations were monitored by yellow sticky traps. The identified aphids exhibited one seasonal peak for each and were found to be active during the first half of March. Data revealed that, Rhopalosiphum padi L peak occurred one week later than both of Schizaphis graminum (Rondani) and Rhopalosiphum maidis (Fitch). The numbers of aphid complex was recorded more at 90 than at 30 and 60 cm height. Hymenopterous parasitoids activity is synchronised with aphid species, whereas they appeared in small numbers at early and late wheat season and showed their peak on March, with a positive correlation coefficient with aphid populations. The tested compounds (Karate, Biscaya, Match 5% EC, Tracer 24% SC and Neem Azal T/S) showed 100% reduction in aphid numbers after 24 h post application. However, the general reduction percentages indicated 99.31 > 98.32 > 97.97 > 97.06 > 95.66%, by using the abovementioned compounds, respectively.     

利用色板诱集棉盲蝽的效果研究

随着转基因棉花在中国的大面积推广,棉盲蝽逐渐成为我国棉花生产中重要的害虫之一。为了对棉盲蝽的生活习性、发生规律、行为特点进行深入研究,本实验在棉田中使用不同颜色色板在不同的时间和不同的高度对田间主要种群绿盲蝽Apolygus lucorum和三点盲蝽Adelphocoris fasciaticollis进行诱集,得到的主要实验结果如下:绿色色板对绿盲蝽有着比较稳定的诱集效果;绿盲蝽和三点盲蝽多活动于18:00—次日6:00;绿盲蝽和三点盲蝽多活动于距地面130cm的高度;每日清理色板上捕获的三点盲蝽和绿盲蝽,可以保持色板的有效性。