What are the common contraindications for insecticide use?
1. Chlorpyrifos is prone to causing phytotoxicity when used during the melon seedling stage, and its use should also be avoided during the flowering stage of some crops. 2. Pesticides containing triazophos should not be used on fruit sugarcane, as they are prone to causing phytotoxicity. 3. Because phoxim decomposes readily in light, its use should be avoided during the watermelon growing period and at the seedling stage of radishes and leafy vegetables (even avoiding use during the growing period...
1. Chlorpyrifos is prone to causing phytotoxicity when used during the melon seedling stage, and its use should also be avoided during the flowering stage of some crops.
2. Pesticides containing triazophos should not be used on fruit sugarcane, as they are prone to causing phytotoxicity.
3. Because phoxim decomposes readily in light, its use should be avoided during the watermelon growing period and at the seedling stage of radishes and leafy vegetables (even avoiding use during the growing period), and for other crops its use should be avoided under strong light conditions.
4. Insecticides containing malathion, when used at high concentrations, are sensitive on cucurbits, pears, peaches, grapes, legumes, crucifers and tomato seedlings, and should not be used.
5. Pesticides containing omethoate and dimethoate, when used at high concentrations on some sorghum varieties, mat grass, tobacco, jujube trees, peaches, plums, apricots, cherries, citrus and olives, are prone to causing phytotoxicity and should be avoided.
6. Pesticides containing trichlorfon, dichlorvos and naled (a dichlorvos precursor) are sensitive on the seedlings of corn, legumes and cucurbits, and cause phytotoxicity on sorghum.
7. Pesticides containing dimehypo and monosultap are prone to causing phytotoxicity when used on cotton, legumes and potatoes, and their use on crucifers during the hot, humid summer season is also prone to causing phytotoxicity. In production practice, dimehypo has also been found to cause phytotoxicity on citrus, so it should be used with caution.