Rapeseed is a profitable crop with economic and energy efficiency and perhaps the best melliferous plant. Besides the advantages, due to the yellow color of the inflorescence, it attracts a large number of insects, many of which are harmful and destroy the plant's organs. Through the present paper, we set out to see what is the range of species of harmful insects found in autumn in several localities in western Romania. The observations were made in the period 2020-2023, in autumn and spring (after sowing, during flowering and silique formation). The results showed the presence of 17 species of different systematic orders, observed in all active and inactive stages (adults, eggs, larvae and/or pupae). The most frequent species were: Phyllotreta nemorum, Phyllotreta atra, Meligethes aeneus, Athalia rosae, Myzus persicae, Ceutorhynchus assimilis, Ceutorhynchus napi, Autographa gamma, Plutella xylostella and Delia radicum, with limits of 3-6 (20/aphid) individuals active, adults or larvae/m2. Besides these, other species with a medium or low frequency (0.5-5 active individuals/m2) were also observed: Helicoverpa armigera, Pieris brassicae, Mamestra brassicae, Eurydema ornata, Ceutorhynchus pallidactylus, Agriotes spp. and Dasineura brassicae. In conclusion, rapeseed attracts many pests, many of them causing damage with significant production losses in the absence of effective monitoring and control strategies.

harmful insects, rapeseed crop, range, frequency

agronomy

Presentation: poster