USE OF ACETAMIPRID IN THE MANAGEMENT OF Athalia rosae POPULATION FROM OILSEED RAPE AGROECOSYSTEM

Athalia rosae larvae attack can lead to complete defoliation of the plant leaving untouched the main veins. Knowing these aspects, in the western part of Romania, research was carried out aiming to reduce the population of Athalia rosae using acetamiprid applied in four doses (0.04 kg/ha; 0.06 kg/ha; 0.08 kg/ha ; 0.1 kg/ha). The effectiveness of the treatments in respect of larval population reduction was determined at 3, 6 and 9 days after application. At the time of treatments spraying, the population level of Athalia rosea showed close and statistically undifferentiated values, between 0.23 and 0.4 larvae/plant. It was observed that, both, the period and the treatment, had a real influence on the number of larvae during the study. Six days after the treatment, the number of larvae was significantly reduced, followed by a increases in the next period. During the study, the treatment applied at 0.08 kg/ha exerted the highest efficiency in terms of Athalia rosea larvae control, registering values of 95.70 and 90.18% after six and nine days after application.