1. What are the safety intervals for commonly used pesticides on vegetables?
(1) Fungicide: 75% chlorothalonil wettable powder 7 days, 77% WP wettable powder 5 days, 50% acetaminophen wettable powder 7 days, 70% thiophanate-methyl WP 7 Days, 50% Nongliling WP for 5 days, 58% thioredoxin MnZn WP for 3 days, 64% antiviral WP for 4 days.
(2) Insecticide: 10% cypermethrin EC for 3 days, 2.5% bromperthrin for 2 days, 2.5% kungfu EC for 7 days, 5% rifampicin EC for 3 days, and 5% anti-CPV WP for 6 days, 1.8% efotin EC for 7 days, 10% fast killing enemy EC for 3 days, 40.7% LOSUN EC for 7 days, 20% Sweeping EC for 3 days, 20% Fenvalerate EC for 5 days, 35% volt Phosphorus for 7 days, 20% fenpropathrin EC for 3 days, 10% Maprilik EC for 7 days, 50% anticonvulsible WP for 6 days, and 5% Dolomit's WP for 7 days.
(3) Acaricide: 50% Bromoxime EC for 14 days, 50% Torc WP for 7 days.
2. What are the main reasons for pesticide residues in vegetable production?
It is mainly caused by improper application of pesticides: (1) The use of highly toxic and high-residue pesticides that are banned on vegetables, such as methamidophos and carbofuran, etc.; (2) The pesticides are not harvested at the prescribed safety intervals after application of pesticides, often in advance. Harvest; (3) do not apply according to the specified concentration, arbitrarily increase the amount, increase the number of applications.
3. What are the harms caused by excessive pesticide residues in vegetable production?
(1) Acute poisoning can cause nerve paralysis and even death;
(2) Chronic poisoning can affect the nervous system, destroy liver function, cause genotoxicity, affect the reproductive system, produce abnormal freak, and cause cancer.
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