Management techniques of Autumn sowing Chinese Cabbage at Seedling stage

? The first is to check and repair seedlings.

Check and replenish the seedlings in time after emergence to ensure the whole seedling, pay attention to the selection of strong seedlings, and eliminate diseased seedlings, weak seedlings and miscellaneous seedlings. Ploughing should be carried out in time after each seedling, and the ploughing should be carried out in accordance with the principle of "shallow first hoe, deep second hoe, and third hoe will not hurt the root".

? The second is to fix the seedlings.

The seedlings were fixed with 10 leaves, and the seedling density per mu was 1800000 for large varieties, 2000,2200 for medium varieties and 2200,2400 for small and medium varieties.

? Third, disease and pest control.

1. Pieris rapae: 1.8% avermectin EC 3000 times, or 25 g / L cyhalothrin EC 2000-3000 times, or 25% diflubenzuron suspension 2000-1000 times spray, pay attention to rotation, spray 2-3 times.

2. Diamondback moth: it can be sprayed with 3000 times of 2% methylaminoavermectin benzoate or 1.8% avermectin EC or 1500 times of 5% flurosemide EC.

3. Beet armyworm: 3000 times of 2% methylaminoavermectin benzoate or 1500 times of 5% flurosemide EC can be sprayed. In order to reduce and delay the resistance of beet armyworm, attention should be paid to the compound and alternate use of different types of pesticides. Meng Jianfeng, Jing Jianmin and Wang Li