Coal stain disease is spread by aphids whitefly spread, it is recommended to play whitefly aphid insecticide + isobutyl urea or putrescine control.

Aphid whitefly pesticide resistance varies from place to place. Generally, enidiamide or thiamethoxam or furosemide or imidacloprid or thiamethoxam, etc., mixed with bifenthrin is also OK.

Thiazinone kills eggs, does not kill adults, it must be mixed with other pesticides used together, thiazinone can not be used for radish, leafy vegetables, there are drug damage. Pyriproxyfen is also effective in killing eggs, but not effective against adult insects, and it is better to use with the above products.

It is recommended that + organosilicon spray, morning and evening to play medicine, playing through. Alternate pesticide components. Protected areas can be combined with the use of insecticidal fumigants.

Alternate pesticide ingredients, do not use the same pesticide ingredients continuously. This is the principle of plant protection.