大豆荚发育程度对点蜂缘蝽成虫寿命及生殖力的影响

【目的】为明确大豆荚发育程度对点蜂缘蝽Riptortus pedestris成虫存活及生殖力的影响。【方法】在室内24℃±1℃恒温下，用不同日龄(5, 15, 25, 35和45日龄)离体鲜豆荚饲喂点蜂缘蝽，测定成虫寿命、产卵前期、产卵期、单雌产卵量等生物学参数和不同日龄豆荚籽粒中脂肪、总蛋白和总糖含量，分析点蜂缘蝽成虫的生物学参数与不同日龄豆荚籽粒中主要营养成分含量之间的相关性。【结果】随着所取食豆荚日龄的增加，点蜂缘蝽成虫的平均寿命、产卵期、单雌产卵量呈先增加然后下降的趋势，而产卵前期的变化趋势则相反。当饲喂35日龄豆荚时，点蜂缘蝽成虫寿命最长(56.90±9.47 d)，产卵前期最短(6.00±0.58 d)，产卵期最长(29.67±6.61 d)，单雌产卵量最高(129.56±36.53粒)，且与取食其他日龄豆荚的成虫之间存在显著差异。点蜂缘蝽成虫寿命、产卵期、单雌产卵量均与豆荚籽粒脂肪和总蛋白含量呈显著正相关，产卵前期与豆荚籽粒脂肪和总蛋白含量呈显著负相关。【结论】大豆荚发育程度对点蜂缘蝽成虫寿命及生殖力等生物学参数具有显著的影响，35日龄豆荚对点蜂缘蝽成虫存活和繁殖最为有利。

Effects of developmental stage of soybean pods on the adult longevity and fecundity ofRiptortus pedestris(Hemiptera: Alydidae)

【Aim】 This study aims to determine the effects of developmental stage ofsoybean pods on the survival and fecundity of the bean bug (Riptortus pedestris) adults. 【Methods】 Different day-old (5-, 15-, 25-, 35- and 45-d-old) fresh pods in vitrowere fed to R. pedestris adults at the constant temperature of 24℃±1℃ in the laboratory.The biological parameters of R. pedestris including the adult longevity, pre-ovipositionperiod, oviposition period, and number of eggs laid per female, and the contents of fat,total proteins and total sugars in seeds of different day-old pods were determined. Thecorrelations between the biological parameters of R. pedestris adults and the contents ofmain nutrients in seeds of different day-old pods were analyzed. 【Results】 With theincrease of pod age, the average longevity, oviposition period, and number of eggs laid perfemale of R. pedestris adults increased first and then decreased, while thepre-oviposition period showed the opposite change trend. When fed with the 35-d-oldpods, R. pedestris adults had the longest longevity (56.90±9.47 d), the shortestpre-oviposition period (6.00±0.58 d), the longest oviposition period (29.67±6.61 d), andthe highest number of eggs laid per female (129.56±36.53), showing significantdifferences from adults fed with the other day-old pods. The adult longevity, ovipositionperiod, and number of eggs laid per female of R. pedestris were significantly positivelycorrelated with the contents of fat and total proteins in seeds of pods, while thepre-oviposition period was significant negatively correlated with the contents of fat andtotal proteins in seeds of pods. 【Conclusion】 The developmental stage of soybean pods hassignificant effects on such biological parameters as the longevity and fecundity of R.pedestris adults, and the 35-d-old pods are the most conducive to the survival andreproduction of R. pedestris adults.