Collection, compilation and sharing of common-sense small tips on pesticides

● For fungicides used as foliar sprays, suspension concentrates or wettable powders should be chosen.● For herbicides used as foliar sprays, since the surface of weed leaves has a waxy layer, formulations such as emulsifiable concentrates containing organic solvents, concentrated emulsions, and suspension concentrates can all be chosen.● The effectiveness of emulsifiable concentrates of insecticides is notably higher than that of suspension concentrates and wettable powders; for the same pesticide active ingredient, it is better to choose an emulsifiable concentrate.● Tebuconazole has two isomers - the R isomer and the S isomer, and the former exerts the fungicidal effect.● Kongfu (lambda-cyhalothrin) cannot be mixed with organosilicon.● Organosilicon has a synergistic effect on chlorpyrifos and triazophos.● Gibberellin cannot be used on citrus in formulations containing organosilicon adjuvants.● Because of the special effect of the adjuvant in Lorsban (chlorpyrifos), used peanut shells become white and shiny.● Lorsban sprayed at 40 ml before rain has the best effect.● Generally, bacterial powder formulations are sprayed in the early morning and at dusk when there is dew, so as to help the bacterial agent adhere better to the stems and leaves of crops and promote spore reproduction, thereby improving efficacy.● Ultraviolet light in sunlight has a killing effect on spores, so bacterial biological pesticides should preferably be sprayed in the evening or on cloudy days.● The combination of abamectin and chlorpyrifos has an obvious synergistic effect, with the highest synergy at 1:50.● For 41% glyphosate isopropylamine salt adjuvant, small factories use 6%-9%, while large factories use 10%-15%.● For downy mildew and gray mold, do not add nitrogen-containing foliar fertilizers; adding potassium-containing fertilizer can increase leaf thickness and also has a fungicidal effect.● Emulsifiable concentrates and microemulsions are oily and transparent, while emulsion in water is milky white; after dilution with water, emulsifiable concentrates turn white, while microemulsions and emulsion in water do not turn white.● Before and after root drenching with fungicides, it is not advisable to water.● White-backed planthopper is sensitive to imidacloprid, while brown planthopper has developed resistance to imidacloprid.● Tobacco whitefly has high resistance to imidacloprid but is relatively sensitive to acetamiprid.● When using phoxim or chlorpyrifos, adding a little imidacloprid doubles the effect and doubles the speed of death.● Acetamiprid has higher activity than imidacloprid and is more affected by temperature.● Acetamiprid decomposes easily at high temperatures, while imidacloprid is relatively stable.● Acetamiprid has a better control effect on aphids, while imidacloprid has a good control effect on mirids and thrips.● Azole fungicides inhibit crop growth and inhibit gibberellin formation; diniconazole and tebuconazole have the greatest inhibitory effect, followed by propiconazole and triadimefon, while hexaconazole and difenoconazole have a smaller effect.● Abamectin has one major drawback, which is that it decomposes easily in the presence of light and oxygen.

Agricultural Assistant