Insecticides

Insecticides

volume is divided into two parts. Part one contains specifications for technical DDT, BHC, met oxyc or^ chlordane, dieldrin, BHC containing 90% or rnore isomer, Pyrethrem extract (cerosol grade), water dispersible powder concentrates containing DDT and BHC and emulsion concentrates containing DDT, BHC and Dieldrin, all being intended for use against vectors of diseases of man. Part two contains...

More about insecticides.

A insecticide is a chemical used to kill insects. Insect control can also include other materials such as repellents, oils, antifeedants and attractants. Ideally, an insecticide would effectively control any target insect ex­ posed to it and would be harmless to man and his domestic animals. It would also be readily available in necessary q u an t i t ie s , s tab le chem ica lly , n on inflamm...

6 Health and Insecticides

Health and Insecticides

Pyrethroids are synthetic chemicals similar to pyrethrins in the pyrethrum extract which is obtained from Chrysanthemum plant. Historically, pyrethroids have been classified into two classes that differ in their chemical structure and symptoms of exposure: Type I pyrethroids include allethrin, tetramethrin, d-phenothrin, permethrin, and bioresmethrin. Type II pyrethroids include cypermethrin, c...

Insecticides From Plants

stabilizer such as cane sugar to liquid lime-sulfur and evaporating to dryncss. Self-boiled lime-sulfur is made by utilizing the heat of hydration or slaking of quicklime, CaO, to carry on the reactions with sulfur. Ammonium polysulfide and sodium polysulfide are made by passing hydrogen Sulfide gas, H.^S, into ammonium or sodium hydroxide containing excess sulfur. It is supposed that the chemi...