What medicine should be used for cabbage worms?

Disease and Pest Control

1. Aphids: 10% nicotine (Kanghelin) 800-1000 times liquid, 25% Actai 750-1500 times liquid, 3% nicotine Control with 2000-3000 times of diphidrid (Mobiran).

2. Rapeseed caterpillars, yellow-striped flea beetles and underground pests: Use deltamethrin (killing) 2000 times solution and 15% cypermethrin 1000 times solution for control.

3. Diamondback moth: Use 50-100ml of 5% Ruijingte suspension agent per mu and 60kg of water for control. Biopesticides such as 5% Itopacin emulsifiable concentrate 2000 times liquid or 3% emamectin salt microemulsion 4000-6000 times liquid or 2% abamectin 3000-5000 times liquid. In addition, biological control technology - sex attractants can be used to trap and kill adult insects. In the early stages of diamondback moth occurrence, trapping and killing with low insect population density in the field can also have a good control effect.

4. Wild slugs (mole crickets): Place tiles, vegetable leaves, or bunches of vegetable poles or branches in the center of the field. They often hide in them after the sun comes out. They can be removed and killed intensively. Mix drugs such as snail enemy or Dingwoxi with rice bran, soybean sugar, grass, etc., and mix them into poisonous bait to kill rust. Use 0.7 kg of 6% Mida granules or 1-2 kg of 3% Snail granules per mu, crush it and mix it with 5-7.5 kg of fine soil, and sprinkle it on the roots near the affected plants in the evening when the soil surface is dry in warm weather. After 2-3 days, wild slugs exposed to the agent secrete a large amount of mucus and die.

Extended information

Cultivation techniques

1. Thinning: When there are 2-3 true leaves, perform the first thinning. The second seedling takes 5-6 leaves. Seedlings can be established with 7-8 leaves. Select different row spacing according to different varieties, leaving one strong seedling in each hole. Weeding can be combined with thinning.

2. Top dressing: After the Chinese cabbage is successfully established, top dressing can be started. Apply 15% of decomposed human feces every 3-4 days at a dosage of 4-5 dan per mu. Depending on the weather and soil moisture conditions, mix human feces and water and apply it. When Chinese cabbage enters the rosette stage, the fertilizer concentration should be increased. Usually, 30% of decomposed human feces should be added every 5-7 days, with a dosage of 15-15% per mu. 20 dan, 75-100 kilograms of dried vegetables or dried hemp. After starting to pack, reapplying top dressing and increasing potassium fertilizer are necessary measures to increase production.

30-40 tons of 50% decomposed human excrement can be applied per acre, and 100 kilograms of plant ash or 10-15 kilograms of potassium sulfate can be applied in ditches. This time the fertilizer used by vegetable farmers is called "heart-filling fertilizer". After the vegetation lines are sealed, top dressing is generally no longer required. If the base fertilizer is insufficient, urea can be applied between rows as appropriate.

3. Cultivating and cultivating the soil: In order to facilitate top dressing, the soil should be loosened and weeded 2-3 times in the early stage. Especially after a long period of rain turns sunny, the kang land should be plowed in time to promote the growth of the root system. In the middle stage of the rosette, apply cake fertilizer and cultivate soil in the ditch to make ridges with a height of 10-13 cm. The purpose of cultivation is mainly to facilitate fertilization and watering and reduce diseases. After cultivating the ridges, pour the manure into the ridge ditches and do not allow it to adhere to the leaves. Pour water into the ditch without soaking the stems. At the same time, the air circulation in the ditch is maintained to reduce the air humidity between the plants. In this way, the occurrence of soft rot can be reduced.

4. Irrigation: During the seedling stage, Chinese cabbage should be watered lightly and frequently to keep it moist. Water intermittently during the rosette period. When dry and wet, the seedlings should be trained appropriately. The water requirements are high during balling, and furrow irrigation can be used when the soil is dry. Irrigation should be done in the evening or at night after the ground temperature drops. Pour in slowly and avoid filling the bed. After water seeps into the soil, the remaining water should be drained as soon as possible. Make sure there is no accumulation of water in the ditch, no water on the border surface, and no water shortage in the root system. Generally speaking, keeping the soil moist from the end of the rosette stage to the middle stage of bulbing is one of the keys to achieving a high yield of Chinese cabbage.

5. Bundling leaves and covering: Chinese cabbage’s core-shaped balls are an inevitable rule of its growth and development, and there is no need to bundle leaves. However, if late-maturing varieties encounter severe cold, in order to promote good balling and delay harvesting and supply, the outer leaves should be lifted up after a light snowfall, tied with straw, and covered with a straw-type agricultural film to protect the inner leaves from freezing damage. , also has a softening effect. Early maturing varieties do not require bunching or mulching.

Reference: Baidu Encyclopedia-Baicai