吹牛大王
发表于 2025-3-26 23:51:03
C. E. Berkoff,R. D. Cramer III,G. Redlem. For the pea aphid the insecticidal activity of the acids and their salts increases with increasing molecular weight and reaches a maximum in lauric acid, after which it falls. The unsaturated acids are more active than the corresponding saturated analogs.
Dawdle
发表于 2025-3-27 02:45:50
C. E. Berkoff,R. D. Cramer III,G. Redlali metals and ammonia is low. Esters of a number of aromatic acids have appreciable acaricidal activity. Thus, the benzyl ester of benzoic acid is powerful acaricide for some species of mites. Introduction of halogen atoms into the benzoic acid and benzyl alcohol groups increases the biological act
预示
发表于 2025-3-27 07:06:30
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abstemious
发表于 2025-3-27 10:16:59
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Affable
发表于 2025-3-27 16:32:25
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Anticlimax
发表于 2025-3-27 18:51:02
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围巾
发表于 2025-3-27 22:54:24
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祖先
发表于 2025-3-28 02:41:46
Introduction,r had reached several hundred thousand. At the present time the number of known species of animals and microorganisms exceeds two million. According to the calculations of Soviet entomologist N. N. Bogdanov-Kot’kov more than 68,000 different insects can inflict damage on man, domestic animals, plant
迅速飞过
发表于 2025-3-28 07:58:50
Pesticide formulations,aration and the conditions under which the chemical compound is brought into contact with the pests of plants, vectors of plant diseases, stored product pests, destroyers of nonmetallic materials, and undesirable plants. The different natures of the chemical compounds used and the variety of objects
nephritis
发表于 2025-3-28 12:04:11
Halogen derivatives of aromatic hydrocarbons,e derivatives of benzene, toluene, xylenes, isopropylbenzene, and cymene and their homologs, the chlorine and bromine derivatives of naphthalene, acenaphthene, diphenyl, diphenylmethane, diphenylethanes and their homologs, fluorocene, anthracene, phenanthrene, pyrene, and others.