Effects of biological insecticides NeemAzal T/S and Pyrethrum FS EC and their interaction with organic products in treatments of pea aphid Acyrthosiphon pisum (Harris) (Hemiptera: Aphididae) on Pisum sativum (L.)

Abstract

The efficacy and effects of two biological insecticides, NeemAzal T/S® and Pyrethrum FS EC, applied individually and in combination with Polyversum (a biological growth regulator and fungicide) and Biofa (an organic foliar fertilizer), in controlling Acyrthosyphon pisum population density were studied. Nurelle D (a synthetic insecticide), applied alone and in combination with Flordimex 420 (a synthetic growth regulator), was used as a standard. The products were applied once (at budding stage) or twice (at budding and flowering stages). Twenty-four variants were studied. The interaction of Pyrethrum with Biofa was the most efficient variant of the biological products, causing a reduction in aphid density that reached 48.2% after double treatment, while Pyrethrum+Polyversum (42.5%) was the second most successful treatment. The combination of Pyrethrum with Biofa achieved the highest efficacy and synergism and their efficacy approached that of the synthetic insecticide.

Upoređivana je efikasnost i interakcija bioloških insekticida NeemAzal T/S i Pyrethrum FS EC u suzbijanju Acyrthosyphon pisum u organskoj proizvodnji Pisum sativum tokom tri godine. Insekticidi su primenjeni pojedinačno i u kombinaciji sa Polyversum (biološki regulator rasta i fungicid) i Biofa (organsko folijarno đubrivo). Nurelle D (sintetički insekticid) primenjen je kao standard pojedinačno i u kombinaciji sa Flordimex 420 (sintetički regulator rasta). Prskanje je sprovedeno jednom (u fazi pupoljka) i dva puta (u fazama pupoljka i cvetanja). Ispitane su 24 varijante. Najefikasnija varijanta među organskim proizvodima bila je interakcija Pyrethrum+Biofa, gde je smanjenje gustine vašiju dostiglo 48.2% u dvokratnom prskanju, dok je sledeća bila Pyrethrum+Polyversum (42.5 %). Najveću efikasnost i sinergizam pokazala je kombinacija Pyrethrum+Biofa, čija je efikasnost bila bliska insekticidu Nurelle D.