Abstract: In order to effectively control Bemisia tabaci of pepper in the rain shelter and heat preservation cultivation of greenhouses in Dongting Lake area after autumn delay, and explore a new prevention and control technology of drug reduction and effi ciency increase, six different combination control measures were adopted, including the field control effects of yellow plate + sex attractant, yellow plate + sex attractant + imidacloprid, yellow plate + imidacloprid, yellow plate + sex attractant + isoprocarb, yellow plate + sex attractant + thiamethoxam + isoprocarb, yellow plate + imidacloprid + isoprocarb against Bemisia tabaci on pepper were compared and analyzed. The results showed that the six prevention and control measures had certain effects on the control of Bemisia tabaci.From the analysis of the decrease rate of insect infestation, yellow plate +sex attractant + thiamethoxam reached
the maximum value (90.8%) at seven days after treatment, and decreased to 77.9% at 14 days. The maximum value
reached 97.6% at the fi rst day after treatment with yellow plate + sex attractant + isoprocarb, and the number of insect
populations decreased signifi cantly, which remained at 74.1% at 14 days. From the analysis of the persistence of the
correction control effect, the control effect of yellow plate + sex attractant + thiamethoxam and yellow plate + sex
attractant + thiamethoxam + isoprocarb were better, and remained above 89.2% at 14 days after treatment. From the
analysis of yield, the yellow plate + sex attractant + thiamethoxam was the highest. Based on the principle of decrement
and synergism, the control technology of yellow plate + sex attractant + thiamethoxam for Bemisia tabaci was the
optimal combination in rain shelter and heat preservation cultivation for pepper after autumn delay of Dongting
Lake area. |