Bioefficacy of Blumea mollis (D. Don) Merr. and Hygrophila schulii (Buch.-Ham.) (Syn. H. auriculata) against Helicoverpa armigera (Hübner)

Indiscriminate use of synthetic pesticides to control the pests causes negative effects on non-target organisms. Some of the chemicals under B and C categories are carcinogenic to humans. The present study was aimed to assess the antifeedant, larvicidal and pupicidal activities of Hygrophila schulii (syn. H. auriculata) and Blumea mollis against Helicoverpa armigera. Maximum antifeedant activity of 70.01% was observed in ethyl acetate extract of H. schulii at 5.0% concentration with LC₅₀ value of 2.0%. B. mollis ethyl acetate extract at 5.0% concentration showed antifeedant activity of 35.40% with LC₅₀ value of 8.38%. The data for antifeedant activity showed homogeneity of variances in Levene Statistics and normality in Shapiro–Wilk test. Ethyl acetate extract of H. schulii at 5.0% concentration showed 68.66% larvicidal activity with LC₅₀ value of 2.97%. It also showed 73.33% pupicidal activity and was statistically significant from other treatments. No pupicidal activity was observed in ethyl acetate extract of B. mollis. All concentrations of ethyl acetate extract of H. schulii showed promising biological activities which differed statistically from other treatments. Ethyl acetate extract of H. schulii could be used to develop new botanical formulations to manage agricultural pests.     

Chemical and gelling profile of ice-ice infected carrageenan from Kappaphycus striatum (Schmitz) Doty “sacol” strain (Solieriaceae, Gigartinales, Rhodophyta)

The occurrence of ice-ice disease in farmedKappaphycus spp. has tremendous implication on thecarrageenan industry in the Philippines. To elucidate the effect of thisdiseaseon the carrageenan quality, the chemical profile of carrageenan extracted fromhealthy and diseased Kappaphycus striatumsacol strain, was investigated using ¹³C and¹H NMR, FT-IR and GPC methods of analysis. The native carrageenanextracts were composed predominantly of kappa carrageenan with trace amounts ofiota and 6-O-methylated carrageenan. Structural evidence indicatesdepolymerization of carrageenan from the ice-ice infectedportion of the thallus (whitish and soft part) lowered levels of iota andmethylconstituents. This finding was correlated to its low number average molecularweight (30 kDa) value. Accordingly, appreciable decreases incarrageenan yield, gel strength and viscosity and increase in syneresis indexwere noted. On the other hand, archetype quality of kappa-carrageenan wasobserved from both healthy and uninfected portion of the diseased thalli.     

B.B.Brodie(1907～1989)

B.B.Brodie博土,一个先驱药理学家和美国国家科学院院士,1989年2月28日逝世。生前是美国国立卫生研究院心脏研究所化学药理实验室的创始人和第一任主任。     

邓叔群(S.C.Teng)先生生平

1902年12月12日出生于福建省福州市。 1915年考入北京清华学堂。 1923年赴美国康奈尔大学留学取得农学士、森林学硕士学位。 1925—1928年攻读康奈尔大学植物病理学博士并被授予全美国最高科学学会 PHI-KAPPA-PHI和SIGMA-XI两枚金钥匙证章并成为其荣誉会员。 1928年回国,任岭南大学、金陵大学和中央大学一级教授。 1932—1941年历任中国科学社生物研究所、中央自然历史博物馆、中华教育文化基金董事会和中央研究院动植物研究所研究员、中央研究院林业实验研究所副所长。 1941—1946年任甘肃省水利林牧公司林业部经理。 1948年当选…     

К ФАУНЕ КОРОЕДОВ(Col.Ipidae)КИТАЙСКОЙ НАРОДНОЙ РЕСПУБЛИКИ

. .OOB epea MHe Ha opeeeHe Heobo MaTepa,copaHHbi BpobH HHaHb. e ocaHHbix.BOB TaM Mecb--Blastophagus piniperda L.,Hylurgopssuleatus Egg.,Pityophthorus lichtensteini Ratz.,Orthotomicus angulatus Eich=golovijankoiPjat.u lps nitidus Egg.poKo pacpocTpaHeHHbi oT CeBepHo Map o     

Pleomorphism inScenedesmus quadricauda (Turp) Bréb. (Chlorophyceae)

A clone ofScenedesmus quadricauda, isolated from Tjeukemeer, exhibits a high degree of morphological variation in synchronized cultures. Cells are synchronized by light-dark cycles. During the photoperiod they build up the capacity to divide. First division into 2- and 4-celled coenobia is induced, then during the second half of the photoperiod the induction of division into 8 unicells takes place. Division itself and the subsequent liberation of daughter cells occur in the dark period.By giving a definite photoperiod the formation of either coenobia or unicellular stages is determined. The formation of both coenobia and unicells is followed using a light microscope. In both cases only the pattern of cytokinesis is similar. After cytokinesis the unicells become ovoid in shape and form two spines at each pole. They are released from the parental wall as separate cells and show remarkable similarity to theChodatella-like cells described by SWALE (1967) and FOTT (1968). The coenobial cells elongate, adhere to one another and each of the two outmost cells forms two spines (SMITH, 1914).     

Polyphyletic allopolyploid origin ofRanunculus cantoniensis (4x) fromR. silerifolius (2x) ×R. chinensis (2x)

Both diploid and tetraploid experimental interspecific hybrids betweenRanunculus silerifolius (2x) andR. chinensis (2x) exhibit normal bivalent pairing. However, microspores of diploid hybrids do not undergo mitosis and their pollen grains are highly sterile, whereas tetraploid hybrids form good pollen grains after microspore division. Evidence is forwarded for the assumption thatR. cantoniensis (4x) has originated by hybridization between these two diploid parental species and by polyploidization of the diploid hybrids. Parallelisms between the different karyotypes ofR. cantoniensis (4x) andR. silerifolius (2x) suggest that the former is a species of polyphyletic origin.     

Paramaritremopsis solielangi n. sp. et Microphallus kinsellai n. sp. (Digenea: Microphallidae) parasites de Charadrii (Aves) du Bélize (Amérique centrale)

The authors describe and illustrate two trematodes from Belize (Central America): Paramaritremopsis solielangi n. sp. from the small intestine of Arenaria interpres is characterised by a body length of 478 m, two short and pre-acetabular caeca, part of the uterus in close association with the cirrus-sac and left caecum, vitelline glands in the shape of a horseshoe, a short pre-ovarian cirrus-sac containing a long, cylindrical, voluminous and unarmed cirrus (size when evaginated: 150×20–30 m) and Microphallus kinsellai n. sp. from the caeca of Actitis macularia characterised by a body length of 370 m and a phallus which is 30 m in diameter and asymmetrical (basically a pad with a moderately developed accessory lobe) and a straight ejaculatory canal. Levinseniella carteretensis is another microphallid recovered from Arenaria interpres. The term of ``phallus' is proposed to name the male copulatory organ which characterizes the Microphallinae.     

Raoul Combes (1883–1964) et la S.I.G.M.A.

Sans résumé     

Nikolaj Ivanovič Vavilov (26. 11. 1887–2. 8. 1942)

Ohne ZusammenfassungGekürzte Fassung eines Vortrages, gehalten auf der Sitzung der Sektion Genetik der Moskauer Gesellschaft der Naturforscher am 26. 11. 1957, auf der gemeinsamen Sitzung der Geographischen Gesellschaft der UdSSR und der Allunionsbotanischen Gesellschaft am 6. 12. 1957 in Leningrad und am 11. 2. 1958 in Moskau vor Studenten der Timirjasev-Akademie. Aus dem Russischen übersetzt von I.Grebenikov undF. Scholz, Gatersleben. F. Kh. Bakhteyev     

МАТЕРИАЛЫ ПО ФАУНЕ КОКЦИД КНР. Ⅲ. НЕСКОЛЬКО НОВЫХ ВИДОВ LEPIDOSAPHINI ФАУНЫ КОКЦИД КИТАЯ(HOMOPTERA, COCCOIDEA)

Lepidosaphini(cem.Diaspididae), 6 LepidosaphesShim.1 Andaspis MacG.