农药混配防治梨黑星病效果好梨黑星病是梨树主要病害，使用单一农药防治效果较差。经多年实践经验，采用农药混配防治梨黑星病成本低，效果好。１．病症特点梨黑星病侵染叶片、果实、芽、新梢等幼嫩组织，从花期到成熟期均可危害。病部产生黑色霉层为主要特征。幼果染病大... Pesticide compound Pear Scytosphaeria Pears pear scab is a major disease, the use of a single pesticide control effect is poor. After many years of practical experience, the use of pesticides mixed pear pear scab control low cost, good effect. 1. Symptoms Pear scab infection of leaves, fruits, buds, shoots and other young tissues, from flowering to maturity can be hazardous. Disease black mold layer as the main feature. Young fruit disease big ...