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Sigillins from Springtails Are Potent Natural Insecticides
Journal of Natural Products, 2020Sigillins are highly chlorinated natural products from the springtail Ceratophysella sigillata (Collembola) that are used to deter arthropod predators. We report here the isolation and structure elucidation of sigillin F, a hydrogenated benzopyranone compound bearing two trichloromethyl groups, and the synthesis of trideoxysigillin (8), a non-natural ...
Michael Steinbiss +7 more
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Risks From Natural Versus Synthetic Insecticides
Annual Review of Entomology, 1994For centuries humans have used natural insecticides to combat insect pests that compete for our food and fiber or that affect public health. Some of these compounds were plant extracts or plant parts, others were mined from the earth. In the twentieth century synthetic insecticides have replaced natural ones as the standard means of controlling ...
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Natural Insecticide Pyrethroids Project
2010Word “Natural” is very popular today. Every advertisement tries to use it to attract consumers. The average consumer misguided by wording, thinking that it is safe, starts using the insecticides inaccurately as in the example of Amber Nickol published in “‘Safe’ Insecticides Now First in Poisoning” article by M. B. Pell and Jim Morris.
Kirichenko, Elmira +3 more
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Limonene - A natural insecticide
Journal of Chemical Education, 1986Secondary students are often eager to pursue independent research projects but it may be a challenge to find an appropriate one. This author shares ideas for such a project with readers.
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An Insecticide Stabilized by Natural Zeolite
Journal of Thermal Analysis and Calorimetry, 1998The synthetic pyrethroide insecticide (R, S)-α-cyano-3-phenoxybenzyl-IR, S-cis,trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanocarboxylate in solid form could be enclosed in and therefore stabilized by natural clinoptilolitic zeolite. The resulting host-guest complex exhibited characteristics different from those of the starting compounds and also ...
A. Sopková, E. Janoková
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Insecticidal organophosphates: Nature made them first
Experientia, 1987Out of the three most important classes of synthetic insecticides only the carbamates and pyrethroids were known to have ancestors in nature. Now two organophosphates (which are quite good insecticides and very potent acetylcholinesterase inhibitors, e.g. comparable to carbofuran) have been isolated fromStreptomyces antibioticus strain DSM 1951.
R. Neumann, H. H. Peter
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Recovery of natural insecticides fromTephrosia vogelii.
Economic Botany, 1966Bioassays, using guppies as a test animal, were conducted onTephrosia leaf extracts of seven plants obtained by four different extraction methods. The total rotenoids recovered by acetone extraction of fresh leaves appeared to have slightly more effective piscicidal properties than rotenoids recovered by acetone extraction of oven-dried leaves.
Donald K. Barnes, Ruben H. Freyre
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Mode of action of natural insecticides
1969Nicotine is an autonomic blocking agent, and acts like acetylcholine but only at ganglia and neuromuscular junctions, initially stimulating then depressing them. Those symptoms caused by applied acetylcholine which resemble those in nicotine poisoning are called “nicotinic”.
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Mount St. Helens ash: a natural insecticide
Canadian Journal of Zoology, 1981Dry volcanic ash from the May 18, 1980 eruption of Mt. St. Helens was lethal to insects. Volcanic ash induced mortality was due to physical rather than chemical properties of the ash. Water loss due to cuticular abrasion and excessive salivation during grooming were the principle causes of death.
John S. Edwards, Lawrence M. Schwartz
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Insecticide Resistance in Natural Enemies
2016Pesticide resistance in pests has severe negative consequences but can be used as a positive trait for natural enemies as an opportunity to improve the simultaneous use of two very valuable tools in pest management: chemical and biological control. Biological control adoption is limited in some areas, crops, or seasons due to the imperative use of ...
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