如果杀虫剂喷洒得太晚，玉米螟早已经在玉米茎的内部安家了。这样，它们就不能被杀死。
If sprayed too late, the corn borer will already have made a home inside the corn stem and will not be killed.
通过施用钾肥和防治玉米螟可有效地减轻玉米茎腐病和穗腐病的危害。
Maize ear rot and stalk rot were reduced effectively by application of potassium fertilizer and control of maize borer separately.
通过施用钾肥和防治玉米螟可有效地减轻玉米茎腐病和穗腐病的危害。
Maize ear rot and stalk rot were reduced effectively by application of potassium fertilizer and control of maize borer separately.
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