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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.     

Rhodobryum commersoni(Schwaegr.) Par. and R. aubertii (Schwaegr.) Thér. in South India.

Abstract

A new species Tristichella dimorpha is described and illustrated and a comparison made with the two other species in the genus, T. spiculifera and T. glabrescens, and with Clastobryella cuculligera to which it appears to be closely related, particularly in sporophytic characters.     

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

Sans résumé     

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…     

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