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Occurrence and control of main vegetable diseases and insect pests in July

Occurrence and control of main vegetable diseases and insect pests in July

News briefing:

The climate of high summer temperature and multiple storms in July is conducive to the occurrence of various diseases and insects, and the insect situation is complex, which is harmful to vegetable production. The main pests are: beet armyworm, Spodoptera litura, melon borer, Liriomyza, Bean field borer, jumping beetle, thrips, aphids; main diseases are: blight, anthracnose, melon blight, vine blight, Cruciferous vegetables seedling stage damping-off disease, wilt disease, rice white rust disease, flax leaf spot, etc.

1. Spodoptera exigua and Spodoptera litura are omnivorous pests, which can cause harm to almost all vegetables. You can choose 15% DuPont suspending agent 3500 times (high efficiency for young and advanced larvae), or 5% Yitaibao EC 1000 times (There may be slight phytotoxicity at the seedling stage of cabbage vegetables), or 20% Miman suspension 1000 times (indication of beet armyworm), spray in the evening (the above formula can also cure diamondback moth, Pieris rapae, tobacco caterpillar, and cotton bollworm) . On dwarf vegetables such as green onions, leeks, etc., 3% Miller granules can also be applied evenly with 1-2 kg/mu mixed with 10 kg of fine sandy soil (also treats underground pests).

2. Leaf miners (commonly known as drawing insects) are mainly harmful to beans, melons, celery, cabbage, etc. The high temperature and dry season occur severely, and they sneak into the leaf flesh and cause damage to the fallen leaves. When a small number of insect passages appear on the leaves in the field, spray the medicine. The first choice is 3500 times of 50% Qianke wettable powder, and 1.8% insect mites kill star EC can also be used to spray 3000 times. Once every 10-15 days, use 2-3 times in a row.

3. Bean wild borer (commonly known as bean borer) mainly damages cowpea and edamame. You can choose to use 4.5% green Pepsi EC 2500 times (or 2.5% Dikill EC 3000 times) plus 5% fipronil suspending agent 1500 times spray, pay attention to spray the petals on the ground also.

4. Jumping beetle (commonly known as ground fleas) whose larvae gnaw on roots and adults gnaw on stems and leaves. It is one of the important pests during the seedling stage of cruciferous vegetables in summer and autumn. 5% fipronil suspension agent 2500 times or 5% can be used. Blockbuster EC 1500 times or 52.25% Nongdile EC 1500 times spray the root base and surrounding ground; also can use 3% ground protection net granules 2-3 kg/mu mixed with 5 kg of fine sand and evenly spread.

5. Melon moth mainly damages watermelon, wax gourd, loofah, bitter gourd, melons and other melons (the damage of pumpkin is relatively light), you can choose 5% fipronil suspension 1500 times + 5% Kazeke EC 1500 times, or 10% Exhaust suspension 1500 times + 90% insecticide mono WP 1000 times, spray in the young larva stage.

6. Thrips and aphids can be sprayed with 20% Kangfuduo concentrated solvent 4000 times or 20% Bixie concentrated solvent 4000 times or 70% Emerald water dispersible granules 15000 times.

7. The blight mainly harms vegetables such as peppers, alpine sweet peppers, late-ripening watermelons, winter melons and other vegetables. Heavy rain is easy to make the disease epidemic. Mainly damage the stems (vines) (the diseased parts are like boiling water and are easy to identify) causing the upper leaves of the damage to dry and die; it also damages peppers, watermelons, winter melons and other fruits, making them lose their commercial value. It is best to cut off the diseased part before spraying, and use 60% flumoxanil wettable powder or 58% Ledomirax wettable powder or 72.2% Prick liquid 600 times spray (to prevent damping-off and downy mildew) The above formula can be used).

8. Anthracnose damages sweet peppers, peppers, watermelon and strawberry seedlings, etc., mainly by spraying before the onset of the disease. The medicine can choose 75% Dakonin wettable powder 600 times or 80% Dasheng wettable powder 600 times, every 7 days Use it 3 times at a time. In the early stage of the disease, spray with 25% torch wettable powder 1500 times or 43% Horric suspension 5000 times or 10% Shi high water dispersible granules 1500 times (also for the treatment of vine blight).

9. Zizania white rust and flax leaf spot are the main diseases in the production of water bamboo, which are serious and harmful, which can cause the leaves of water bamboo to turn yellow, greatly reduce the yield and quality. At present, the most effective medicine is 25% torch wettable powder 1500 times or 12.5% ​​rickshaw wettable powder 2500 times spray, every 15 days or so, use 2-3 times in succession, spraying should be careful and thoughtful (Note: pregnancy Use with caution).

10. Bacterial diseases mainly include bacterial wilt of solanaceous vegetables, soft rot of cabbage, black rot of radish, bacterial brown spot of watermelon, cucumber angular spot disease, etc., use copper preparation to spray protection and use 45% sen before the onset 1500 times of ammonium aqua solution for rooting has a good preventive effect. In the early stage of the disease, it can be sprayed with 20% monk bacillus wettable powder 1000 times or 10% Kuikuning soluble powder 1200 times.

In addition, attention should also be paid to the prevention and control of downy mildew, celery leaf spot, california spodoptera, tobacco green worm, and bamboo stem borer. In the prevention and control of diseases and insects, pesticides must be applied strictly in accordance with the law, and safety intervals must be observed to ensure It is safe to eat vegetables.