Инсектициди за борба с памуковата листна въшка (Aphis gossypii Glover) по памука
Стефан Рашев
Институт по полски култури, 6200, Чирпан, България
Резюме
During the 2016-2017 period, a field experiment has been carried out at the
Field crops institute - Chirpan as naturally infected with cotton aphid including
4 replications of 10 m2 for each variant. We investigated insecticides Danadim
progress 400 ЕC (dimethoate 400 g/l), Pirinecs 48 EC (chlorpirifosetil 480 g/l),
Deccis 100 ЕC (deltamethrin 100 g/l), Mospilan 20 SP (acetamiprid 200 g/kg),
Lannat 25 WG (methomyl 250 g/kg) and Warrant 20 SL (imidacloprid 200 g/l).
The efficacy of the formulations for each variant calculated using the Henderson –
Tilton formula.
In the insecticides with clear contact action: Danadim progress 400 ЕC
(dimethoate), Pirinecs 48 EC (chlorpirifosetil), Deccis 100 ЕC (deltamethrin) and
Lannat 25 WG (methomyl) the efficacy decreases after the seventh day and varies
between 60-80%. While the systemic action Mospilan 20 SP (acetamiprid) and
Warrant 20 SL (imidacloprid) maintains high efficacy (90%) by the fourteenth
day after treatment which provides protection cotton for a period of time which in
contact insecticides to be achieved through two treatmens.
