Yushchenko L. Pest that harm plum fruit in the nothern steppe region of Ukraine and measures of decreasing their amount.

The object - Stading biology, phonology of pests and harmful the pests plum fruit; stading the efficiency of biological remedies against the black plum borer, the plum seedworms. The methods - laboratory, field, laboratory- field. The novelty -The has been studied the biology pests plum fruit in the northern steppe of Ukraine. There also has been determined biometric characters fics of the black plum borer chrysalises, by wеight and length (7,4±0,14 mg and 5,0±0,06 mm accordingly). Closer definition places spend the winter pests (blac plum borer - 30,2 specimens/m2, plum seedworms - 2,0-2,5 specimens/m2, tree.)The complex limit of harm that caused the possibility of determining harvest lost and their forecast have been defined. The fact that more common and harmful the black plum borer is found out almost in all plum gardens and harms over 80% of harvest annually. The optimal terms of taking protection measures against the black plum borer and their divisibility depending on efficiency of used methods,have been determined. There has been studied the efficiency of biological remedies, hormone remedies against the black plum borer, the plum seedworms. Field -agriculture.