Potato ladybug and 28 star ladybug
The potato ladybug is very similar in morphology to the nightbug. As soon as potato budded, adults and larvae concentrated on well-growing plants to feed on leaves and overwinter as adults. Overwintering adults lay eggs in the field around April and emerge in July. One generation occurs a year in spring sowing area.
The larvae and adults of ladybug 28 punctatus harm the leaves of eggplant, potato, tomato, cucumber and other vegetables, causing wilt. The larvae live on the back of the leaves. Adults occur 2~3 generations a year in warm areas, overwintering as adults, and generations overlap. After overwintering, the adults swarm in potato fields and migrate to eggplant fields after potato withers. Adults lay eggs on the back of leaves, yellow eggs, eggs stuck together.
To control potato ladybug and beetles, 40% dimethoate 1000~1500 times solution, 90% trichlorfon 1000 times solution, 10% high-effect methomyl EC 2000 times solution, 52.25% Nongdile EC 1000~1200 times solution, 2.5% kungfu pyrethroid 3000 times solution, 48% Rospen EC 1000 times solution, 24.5% Azizi EC 1500~2000 times solution, 0.36% Baicao No.1 EC 1000 times solution and other pesticides spray.
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Potato ladybug
Potato lady beetle (HenosepilachnavigintioctomaculataMotschulsky) belongs to Coleoptera, Coccinellidae. It is widely distributed in the north of China. It is mainly harmful to potatoes, eggplant, cabbage, rape, beans, melons and so on. [field identification] both adults and larvae eat harmful leaves and gnaw on one side of the epidermis and mesophyll, resulting in many reticular pits. The adult is about 8 mm long and hemispherical. The back of the body and the sheath wings are yellowish brown, in the anterior chest dorsal plate.
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Production of ordinary potato vermicelli
1. Technological process. Raw material selection → starch processing → thickening and noodle → leaking powder into silk → cooling and drying finished product 2, operation points ⑴ raw material selection: select non-pest-free, mildew-free potatoes, wash away the sediment and dirt from the skin. ⑵ starch processing: crush and filter the washed potatoes, add an appropriate amount of acid pulp and stir and precipitate (the acid pulp water is stored separately from the floating water precipitated for the first time). The amount of acid pulp depends on the air temperature. If the temperature is about 10 ℃, the pH value should be adjusted to 5.6-6.0; if the temperature is above 20 ℃, the pH value should be adjusted to
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