Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract Full Text

Control efficacy of the combinations of several conventional insecticides on fall armyworm (Spodoptera frugiperda) and their economic.

Abstract

Control efficacy, whorl injury rate, and insecticides costs of 7 insecticide combinations using for control fall armyworm, Spodoptera frugiperda, was compared in corn field. The results showed that spinetoram 60 g/L SC+Bacillus thuringiensis 8 000 IU/µL SC, avermectin benzoate 5% EC+B. thuringiensis 8 000 IU/µL SC, and avermectin benzoate 5% EC+lufenuron 20% EC had the better control efficacy to S. frugiperda. Their control efficacy was 93.7%-95.69% on lower instar larvae and 93.49%-97.07% on higher instar larvae at day 14 after treatment. Meanwhile, spinetoram 60 g/L SC+B. thuringiensis 8 000 IU/µL SC, avermectin benzoate 5% EC+B. thuringiensis 8 000 IU/µL SC, avermectin benzoate 5% EC+lufenuron 20% EC, and beta-cypermethrin 1.5% EC& phoxim 18.5% EC+lufenuron 20% EC had significant lower whorl injury rate at day 14 after treatment, which was 8.33%-11.67%. The comparison of control efficacy and insecticide cost showed that 1.5% beta-cypermethrin & 18.5% phoxim EC lufenuron 20% EC should be recommend as lack of finances for control this insect. Moreover, avermectin benzoate 5% EC+B. thuringiensis 8 000 IU/µL SC, B. thuringiensis 8 000 IU/µL SC, and avermectin benzoate 5% EC+Lufenuron 20% EC will be recommend and would attain a better control efficacy as sufficient control funds exist.