Evaluation in a bioclimatic environment of agrochemicals in the mortality of adults of the potato Andean weevils (Premnotrypes spp.)

Abstract

Adults of the Andes weevil (Premnotrypes spp.) were subjected to the studies of the effects of the active ingredients Clotianidin, Fipronil, thiamethoxam, Metaflubizona, Carbofuran, Chlorpyrifos and Lambdacialothrin; accordinaly, a bioclimatic environment was installed, where 10 adults per 500 cc capacity bottle and the treated leaves were subjected on the third, seventh and fourteenth days. The number of living adults was evaluated on the first day, fourth and fourteenth. The recorded data were interpreted based on histograms and the statistical analyzes were contrasted on the basis of the completely randomized design with 4 repetitions the Tukey test at 95 % reliability, and the Abbot formula was used for efficiency. The following results were obtained; on the third control day, the treatments that stood out were: Dantotsu (Clotianidin, 200 g / 200 l of water), Murder (Fipronil and thiamethoxam, 300cc / 200 l of water) and Regent (Fipronil, 300cc / 200 l of water) registering 2.00 to 2.75 average live adults, on the seventh day of the control the treatments that stood out were: Dantotsu (Clotianidin, 200 g / 200 l of water) and Murder (Fipronil and thiamethoxam, 300 cc / 200 l of water) registering 0.75 to 1.25 average live adults, on the fourteenth day the following stood out: Dantotsu (Clotianidin, 200 g / 200 l of water, Murder (Fipronil and thiamethoxam, 300 cc / 200 l of water) and Regent (Fipronil, 300 cc / 200 l of water). Registering no living adults on the fourth evaluation day. The highest efficency was registerd in Dantotsu (Clotianidin, 200 g / 200 l of water) with an 100 % efficiency up to 14 days after applying the treatments, followed by Murder 300 cc / 200 l of water with an efficiency of 100 % up to 7 days after control and 90 % on the fourteenth day.