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菜心初花期,通过喷施0.2％的硼肥,0.2％的磷酸二氢钾、2％的尿素、40％氧化乐果1000倍液和50％的敌敌畏乳剂800倍液组成的混合液,即可
Flowering cabbage early flowering, by spraying 0.2% of boron, 0.2% of potassium dihydrogen phosphate, 2% urea, 40% omethoate 1000 times and 50% dichlorvos emulsion 800 times the mixture of liquid that is can