STUDY OF THE EFFECTIVENESS OF PESTICIDES THIAMETHOXAM AND ACETAMIPRID AGAINST CABBAGE APHID BREVICORYNE BRASSICAE AND MEASURE THE RESIDUE OF ACETAMIPRID IN LEAVES AND SOIL OF CABBAGE USING HPLC

This study aimed to evaluate the effectiveness of two pesticides Thiamethoxam 25% WG and Acetamiprid 20% SL against nymphs and adults of Brevicoryne brassicae during agriculture season 2019-2020 in field of Faculty of Agriculture, Kerbala University. The results showed that the pesticides Thiamethoxam 25% WG and Acetamiprid 20% SL significantly affected the mortality of aphid adults. The higher mortality of adults was 99.91% and 99.34% after five and three days of treatment by Acetamiprid. However, the percentage of nymph’s mortality reached to 99.94% after five day, respectively, of treatment by Acetamiprid compared with 45.78% after one day of treatment.

The study of Acetamiprid residue showed that the percentage of pesticide in Cabbage leaves was 88.93 mg/kg after one hour of treatment, which reduces to 3.70 mg/kg after 10 days of treatment and then the HPLC did not recode any recommended concentration.

Also, the result of Acetamiprid residue in soil showed that the concentration of pesticide was low by 17.43% mg/kg for recommended concentration after one day of treatment and then reduce to 6.23 mg/kg after seven days of treatment which is continued till the HPLC did not record the pesticide.