How to manage autumn-sown Chinese cabbage during the seedling stage? All the technical key points are here

????First, check and fill gaps in the seedlings.

After emergence, promptly check the seedlings and fill gaps to ensure a full stand, taking care to keep strong seedlings and remove diseased, weak, and off-type seedlings. After each thinning, cultivate promptly; cultivation should follow the principle of "first hoeing shallow, second hoeing deep, third hoeing without injuring the roots";

?Second, final thinning.

Final thinning at 8-10 leaves, with a retained plant density per mu of 1800-2000 plants for large varieties, 2000-2200 plants for medium varieties, and 2200-2400 plants for small and medium varieties.

?Third, pest and disease control.

1. Imported cabbageworm: use 1.8% abamectin emulsifiable concentrate at 3000 times dilution, or 25 g/L lambda-cyhalothrin emulsifiable concentrate at 2000-3000 times dilution, or 25% diflubenzuron suspension concentrate at 500-1000 times dilution as a spray; take care to rotate the pesticides, spraying 2-3 times consecutively.

2. Diamondback moth: use 2% emamectin benzoate or 1.8% abamectin emulsifiable concentrate at 3000 times dilution, or 5% hexaflumuron emulsifiable concentrate at 1500 times dilution as a spray.

3. Beet armyworm: use 2% emamectin benzoate at 3000 times dilution, or 5% hexaflumuron emulsifiable concentrate at 1500 times dilution as a spray. To reduce and delay the development of resistance in beet armyworm, take care to mix and alternate different types of pesticides. Meng Jianfeng, Jing Jianmin, Wang Li