Abstract:

To scientifically and reasonably control soil insects with “Saochongguang” and make sure of its safety to capsicum development, its control effects to soil insects and effects on the rate of seed germination, seedling growth, transplanted plant height, main stem diameter, leaf width, length of branching stems, number of buds of the cutivar capsicum ‘Miaofeng III’ were tested using general biological methods. The results showed that, 1000-fold dilution, 1500-fold dilution, 2000-fold dilution, or 30 kg/hm2, 45 kg/hm2 and 60 kg/hm2 of “Saochongguang” were better to control soil insects and there were not any survival soil insects for 30 days after “Saochongguang” treatment when the seedlings were transplanted. 500-fold dilution of “Saochongguang” was also better to control soil insects, but the plants could not normally develop. However, 2500-fold, 3000-fold dilution and 15 kg/hm2 of “Saochongguang” were not effective to soil insects. Given the economic, efficient and simple operation, 1000-2000-fold dilution and 30 kg/hm2 of “Saochongguang” were widely applied to control soil insects.