author(s)
Juria Machida and Kengo Nakahira

abstract
The cotton aphid (Aphis gossypii Glover) (Homoptera: Aphididae) is an important insect pest worldwide because it infests a wide variety of crops and develops insecticide resistance. Spiracle-blocking insecticides are often effective against aphids that have developed insecticide resistance. In this study, the insecticidal effects of a spreader, Mairino^® and an adjuvant, Approach^® BI, on A. gossypii were investigated to search for new spiracle-blocking insecticides. We used the standard, and concentrations of the products and found highly significantly corrected mortality rates at 10× dilution of the spreader and 10×, and 100× dilutions of the adjuvant. Specifically, the adjuvant had a highly significant effect on the mortality rate of A. gossypii, and since it did not show phytotoxicity, it might be practical for use as an insecticide. However, to utilize spreaders and adjuvants as insecticides, it is necessary to study their phytotoxicity in more detail.