How to prevent and control pests and diseases in autumn peanut cultivation
The main diseases of peanut include leaf spot and rust. For leaf spot, spray pesticide in time at the early stage of disease onset to prevent and control the disease. Use 75% chlorothalonil + 70% thiophanate-methyl at 1000-1500 times dilution; or 30% copper oxychloride + 75% chlorothalonil at 1000 times dilution, spraying 2-3 times, once every 10-15 days, used alternately, sprayed evenly and thoroughly. For rust, strengthen monitoring and forecasting. Begin regular inspection of the lower leaves of the plants at the early flowering stage, and spray pesticide in time to control the disease. You can use 50% triadimefon sulfate suspension concentrate at 1000-1500 times dilution; or 30% copper oxychloride + 75% chlorothalonil at 1000 times dilution for spray control 2-3 times, once every 7-15 days, used alternately. If peanut shows physiological yellow dwarf phenomenon, per mu you can use magnesium sulfate, zinc sulfate, and copper sulfate at 50 grams each, plus borax 100 grams, urea 250 grams, and phytoalexin 1 vial, dissolved in 60 kg of water, spray once every 7 days, continuously spray 2-3 times.
The main insect pests of peanut include peanut thrips, aphids, leaf rollers, and tobacco cutworms, etc. Once thrips and aphid damage is found, promptly choose 2.5% cypermethrin emulsifiable concentrate at 2000 times dilution or 50% chlorpyrifos emulsifiable concentrate at 1000 times dilution (or a mixture of both), 48% lesben emulsifiable concentrate at 1000 times dilution, 25% acetamiprid water-dispersible granules at 5000 times dilution, etc. for spray control. Leaf rollers and tobacco cutworms should be controlled by applying pesticide at the early stage of young larvae (before the 3rd instar). Optional agents include 2.5% cypermethrin emulsifiable concentrate at 2000 times dilution or 50% chlorpyrifos emulsifiable concentrate at 1000 times dilution (or a mixture of both), 10% chlorfenapyr suspension concentrate at 1000 times dilution, 20% diflubenzuron suspension concentrate at 1000 times dilution, 48% lesben emulsifiable concentrate at 1000 times dilution, 5% tebufenozide emulsifiable concentrate at 800 times dilution, etc.
During peanut maturity, pay attention to rodent control. Place diphacinone sodium salt and bromadiolone bait at fixed points around the planting area, and set up obvious warning signs to ensure the safety of people and livestock.