AI Article Synopsis
- The study investigates the resistance of an indigenous pest species in Benin to the insecticide deltamethrin, which is widely used by farmers to manage crop damage.
- Field populations were tested for susceptibility and showed alarmingly high resistance levels, especially in crops like cowpea, cotton, and tomato, raising concerns for effective pest management.
- The research also found that combining deltamethrin with the P450 inhibitor Piperonyl Butoxide significantly increased mortality in the larvae, indicating that metabolic resistance mechanisms may be at play among these pest populations.
Article Abstract
is an indigenous species in Africa and has been reported in the destruction of several crops in Benin. Management of pest is mainly focused on the use of synthetic pyrethroids, which may contribute to resistance selection. This study aimed to screen the susceptibility pattern of field populations of to deltamethrin in Benin. Relevant information on the type of pesticides used by farmers were gathered through surveys. Collected samples of (F) were reared to F. F were subjected to morphological speciation followed by a confirmation using restriction fragment length polymorphism coupled with a polymerase chain reaction (RFLP-PCR). F (larvae) were used for insecticide susceptibility with deltamethrin alone and in the presence of the P450 inhibitor Piperonyl Butoxide (PBO). Deltamethrin and lambda-cyhalothrin were the most used pyrethroids in tomato and cotton farms respectively. All field-sampled were found to be . Susceptibility assays of to deltamethrin revealed a high resistance pattern in cowpea (resistance factor (RF) = 2340), cotton (RF varying from 12 to 516) and tomato (RF=85) farms which is a concern for the control of this major polyphagous agricultural pest. There was a significant increase of mortality when deltamethrin insecticide was combined with piperonyl butoxide (PBO), suggesting the possible involvement of detoxification enzymes such as oxidase. This study highlights the presence of P450 induced metabolic resistance in populations from diverse cropping systems in Benin. The recorded high levels of deltamethrin resistance in is a concern for the control of this major agricultural pest in Benin as the country is currently embarking into economical expansion of cotton, vegetables and grain-legumes cropping systems.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6603559 | PMC |
| http://dx.doi.org/10.3390/ijerph16111882 | DOI Listing |
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