Influence of insecticide seed treatment on pollinator and harmful insects visit to sunflower

Abstract

Sunflower yield is related to many factors and one of those factors is insecticide seed treatment. Aim of this research was to analyze the influence of insecticide seed treatment on pollinator and harmful insect visit, as well as on yield. Research was conducted at Rimski Šančevi, during 2008. using a commercial sunflower hybrid NS-H-111. Impact of six different insecticides was tested throughout total number of plants, number of plants damaged by insects, pollinator visit and seed yield. Among pollinators, honeybees were much more frequent than bumblebees, hoverflies and solitary bees. Harmful insects were present very rarely and leaf surface damage intensity was low, not more than 10%. Derived results show that insecticide seed treatment did not significantly influence pollinator visit. To fully understand the impact of insecticide seed treatment on pollinators, insecticide concentrations in pollen and nectar should be measured and determine the influence on pollinators.

Prinos suncokreta zavisi od niza faktora, a jedan od često prisutnih je i tretman semena insekticidima. Cilj ovog istraživanja je provera uticaja tretmana semena insekticidima na posetu oprašivača i štetnih vrsta insekata, kao i njihov uticaj na prinos semena. Istraživanje je vršeno na lokalitetu Rimski Šančevi, tokom 2008. godine na hibridu suncokreta NS-H-111. Testiran je uticaj šest različitih insekticida i određivan je ukupan broj biljaka, broj biljaka oštećenih od insekata, poseta oprašivača i prinos semena. Od prisutnih oprašivača najčešće su bile pčele koje su dominirale u odnosu na bumbare, muve lebdilice i solitarne pčele. Štetni insekti su bili slabo prisutni i stepen oštećenja lisne mase nije prelazio 10%. Dobijeni rezultati upućuju na zaključak da tretmani insekticidima ne utiču značajno na posetu oprašivača. Da bi se u potpunosti sagledao uticaj insekticida na oprašivače potrebno je odrediti koncentracije insekticida u polenu i nektaru i odrediti njihov uticaj na oprašivače.