Fruit growing
and viticulture of South Russia

Annotation

In the last 10 years the increase in intensity of spreading and development of grape felt mite is observed and its harmfulness becomes stranger. Expansion of an area of wrecker�s spreading causes the necessity of carrying out of research directed on studying of features of its development and elaboration of system of protective measures for industrial grapes plantings. The work purpose is differentiation of grapes varieties zoned in the Southern Steppe of Ukraine on a damage rate of grape felt mite; an assessment of its harmfulness; studying of efficiency of insekt-acaricides from various chemical groups and determination of optimal terms of their application. The methods of research are: field � for determination of intensity of spreading and harmfulness of grape felt mite; agritechnical � measurement of productive indicators of grapes plants; culculative � for determination of efficiency of system of protective measures. It is shown that efficiency of studied preparations is 78-90 % on the 28th day after spraying, and on the 45th day is 75-94 %. Maximum efficiency was obtained under treatment by Demitan and Masay preparations. In the course of work the features of development of a grape felt mite, the level of its spreading and harmfulness at zoned grapes varieties are studied; the optimal terms of carrying out of protective measures are determined and the most effective insecticides from various chemical groups are revealed. The developed protective measures allow to increase the net income due to increasing of yield�s quantity and quality of grapes and save the material resources to produce a unit of production. Prime cost of 1 ton of grapes production decreased in comparison with control by 5%; with application of studied preparations the net income increased on options I-III by 14%; the profitability of grapes production increased by 9%.