Pest Control Techniques for Common Crops in Late Autumn

The common crops in late autumn are mainly autumn vegetables, autumn glutinous rice, and artichokes. The following are the main opinions on the occurrence and control of major diseases and insect pests. I. Autumn vegetables There are many kinds of vegetables in autumn, mainly including cauliflower, cabbage, cabbage, lettuce, radish and lotus white. The main pests are Spodoptera litura, beet armyworm, cabbage caterpillar, diamondback moth, aphid, etc.; the main diseases are: lettuce downy mildew, cruciferous downy mildew, viral disease, cabbage black spot, soft rot and so on.
1. Prevention and control of Spodoptera litura, Spodoptera exigua, Pieris rapae, Plutella xylostella, etc. (1) Occurrence of the field: According to the plant protection station, on August 30-31, the cabbage was investigated in Wangyemiao Village and Wu'an Village of Taihe Town. 40 pieces of vegetable land such as lotus white and radish, 100-156 heads of cabbage caterpillars, with an average of 22.9 heads; 5-35 heads of Spodoptera litura, with an average of 7.8 heads; 2-48 heads of beet armyworm, with an average of 5.6 heads; Plutella xylostella 7 -34 heads, an average of 10.5 heads, aphids 130-2430 heads, an average of 589 heads; 6 pieces of onion seeds, 100 beet armyworms 3-29 heads, an average of 6.8 heads.
(2) Control methods: artificially remove the eggs of the night moth and catch the larvae; the pesticide control should be applied at the peak of the young larvae, and the insecticide should be used once every 7 days, for 2-3 times. Control agents: acre with a secret name or Weidan or Vicky 50 ml water 45 kg control. For the control of aphids, use Baifuling or chlorpyrifos 5000 times solution.
2, black spot disease, downy mildew, soft rot and other prevention and treatment.
Black spot and downy mildew are the most important diseases of vegetables. The main symptom of black spot is that the leaves are dark brown spots, mainly on cabbage. The main symptom of downy mildew is the generation of irregular polygonal lesions on the leaves, and the frosty mildew on the back of the leaves, mainly in the lettuce and cabbage. Black spot and downy mildew can be controlled with 75% chlorothalonil 600 times in the early stage of the disease, and controlled once every 7 days, for 2-3 times.
Soft rot is mainly harmful to cabbage, and its symptoms are that the heart of the cabbage and the base of the petiole rot, full of taupe sticky and smelly. The prevention and treatment method is to spray 30 ml of Puer or Sterling on the diseased plants and surrounding plants.
Second, autumn è‹• attention to the control of sweet potato hawk moth, larvae (also known as pig worms) to feed the red scorpion leaves, in severe cases can be eaten into the leaves of the field. Foliar spray can be adopted, and 50 ml of insects or insects can be used to control pig worms, and the leaf curlers can be treated concurrently.
Third, autumn 芋 1, late blight: The disease occurs in the leaves, stems and potato blocks of the artichokes. The incidence of the leaves mostly starts from the tip of the leaf or the edge of the leaf. It is initially water-stained, and gradually enlarges. It is nearly round, dark brown and has no obvious edges. When the air humidity is high, the lesions expand rapidly and can spread to most of the leaves and even the whole leaves. There is a circle of white mildew on the edge of the lesion, especially after rain or morning with dew. The air is dry and the lesions become brown, dry, cracked or curled. The stems and petiole are infected, and irregular brown streaks are formed. In severe cases, the leaves are sallow and curled, resulting in black rot. Potato tubers are infected, and the primary light brown spots become irregular brown to purple-brown lesions. They are slightly sunken and the edges are not obvious. The subcutaneous potato is light brown to dark brown, and the potato chips are rotten. In autumn, the disease is more serious, and its yield has a great impact. Therefore, the masses should conduct diligent investigations and find that diseased leaves and diseased plants are immediately removed and destroyed, and rapid spraying is prevented. Can use 64% of anti-virus cockroaches 500 times liquid in the early stage of the disease prevention and treatment 1 or 2 times.
2, viral disease: the use of detoxification varieties, early control of aphids to control their transmission. In the seedling stage, aphids or chlorpyrifos 5000 times liquid can be used to control aphids.

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