TESTING OF THE NEW ACTIVE INGREDIENTS FOR CONTROLLING OF THE OSTRINIA NUBILALIS HBN AT MAIZE CROP, IN CONDITIONS OF ARTIFICIAL INFESTATION, AT NARDI FUNDULEA

Abstract

In this paper, author collective present preliminary results of new active ingredients testing for vegetation treatment against European corn borer at maize crops. Maize plants were artificial infested witch Ostrinia nubilalis egg batches produced in laboratory conditions, from insects reared consecutive generations, using same artificial diet. Climatic conditions from summer period were favorable for pest evolution in 2016 comparative with 2014. At untreated maize plants, average number of larvae per plant was 3.03 in 2014 and 14.70 in 2016 while average length of the cavities per plants was 13.41 cm in 2014 and 20.18 cm in 2016. At treated variants, in climatic conditions of the summer of 2014 and 2016, higher effectiveness was registered in case of higher dose of indoxacarb active ingredient and chlorantraniliprole active ingredient, in dose of 150 and 200 ml p.c./ha