Сравнительная оценка эффективности разных популяций хищного клеща Phytoseiulus persimilis A.–H. в условиях производственных теплиц

Abstract

The experiments were carried out in the commercial greenhouses of the farms of the Leningrad region, i.e. “All the Year” Co Ltd on the “Meva” cucumber variety and “Agrolider” Co Ltd on the “Red Naomi” rose variety, and showed the high efficiency of predatory mite Phytoseiulus persimilis A.–H. from the population originated from greenhouses of Egypt (“Egyptian”). In the centers with high pest density, the decrease in the number of spider mites occurred 1.7 times faster, when the “Egyptian” population of predatory mites was used in comparison with the other tested populations (standard). Ph. persimilis biological efficiency in spider mite control in relation to the standard was 99.9 % at the 16th day after release. With the help of the “Egyptian” population on roses, decrease in the spider mite density below one point was achieved much earlier and at lower cost, than at the standard. The release rate of the acariphage of the “Egyptian” population can be 3 times less on the cucumber and 2 times less on the rose in comparison with the other tested populations of Ph. persimilis used.