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Researches on wine moths flight captured on pheromone traps

Published in Scientific Papers. Series B. Horticulture, Vol. LVI
Written by Oana Ecaterina POPA

The forecasting and warning system in Romania started with a control programmes applied against Plasmopara viticola, the most important pathogen of grapevine. Since then, studies and new techniques have been developed and applied to other important pests of vineyards, including Lobesia botrana and Eupoecilia ambiguella, different models have been evaluated as an important part of the control strategy, field monitoring using pheromones traps is used to formulate warnings that are sent out to farmers about the need to spray or not. Our researches were done in village Fantanele, county Prahova situated on the “wine road” which capitalize famous “Dealul Mare” vineyard. The biology (flight curves of moths) of Lobesia botrana (grape vine moth), Eupoecilia ambiguella (European grape vine moth) was monitored in vineyard, in 2010-2011 using a sex pheromone traps, with a view to forecasting the damage rate and determining the best time to apply insecticides. Our data confirm that grape vine moth has 2-3 annual generations the moths appear from the end April until the end May flights spread over 2 to 3 weeks, the second flight takes place end of June-July and the third flight occurs in August-September, in the same time European grape vine moth has 2 annual generations, the moths arising from overwintered pupae appear at variable dates depending on year, the second flight takes place 2 to 2.5 months after the first. Data obtained confirm previous information’s that before the 1st chemical application against adults, the peak of the flight curve should have been reached, for 1st flight the flower buds should be formed, and the pests’ infestation rate in the vineyard should be at least 20%. For the 2nd application, at least one flight peak should have occurred, the grapes should be the size of peas and the infestation rate should be 1%. Sex-pheromone trapping have been used in determination of critical biological stages of these pests. Generally a total of 2-3 treatments used to be applied against these pests but, using a proper warning system based on counting of captures from pheromone traps the number of chemical treatments could be reduced to 1.

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