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Effects of temperature on baseline susceptibility and stability of insecticide resistance against Plutella xylostella (Lepidoptera: Plutellidae) in the absence of selection pressure
- Source :
- Saudi Journal of Biological Sciences, Saudi Journal of Biological Sciences, Vol 27, Iss 1, Pp 1-5 (2020)
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- Plutella xylostella L. (Lepidoptera: Plutellidae) is an important pest causing significant losses to vegetables worldwide. Insecticides resistance in P. xylostella is a serious issue for scientists since last 30 years. However, deltamethrin and Bt Cry1Ac are commonly used insecticides against P. xylostella but studies involving development of resistance in P. xylostella against these two insecticides at different temperatures are lacking. The current study was aimed to find out the toxicity of deltamethrin and Bt Cry1Ac, and resistance development in P. xylostella. Results showed that the positive correlation between the temperature and toxicities of deltamethrin and Bt Cry1Ac. The results indicated −0.051, −0.049, −0.047, and −0.046 folds of deltamethrin resistance at 15 °C, 20 °C, 25 °C, and 30 °C temperatures, respectively from 1st to 12th generations. The toxicity of Bt Cry1Ac after 24 h was 2.2 and 4.8 folds on 1st generation at 20 °C and 25 °C temperatures, respectively compared to the toxicity recorded at 15 °C (non-overlapping of 95% confidence limits). Based on the results of this study, it is concluded that the temperature has a positive correlation with the toxicity of deltamethrin and Bt Cry1Ac against the larvae of P. xylostella. This study suggests that deltamethrin and Bt Cry1Ac can be included in the management program of P. xylostella on many vegetable crops. The baseline susceptibility data might be helpful to understand the resistance mechanisms in P. xylostella. Keywords: Bt Cry1Ac, Deltamethrin, Diamondback moth, Plutella xylostella, Temperature coefficient
- Subjects :
- Temperature coefficient
0106 biological sciences
0301 basic medicine
01 natural sciences
Article
Lepidoptera genitalia
Toxicology
03 medical and health sciences
chemistry.chemical_compound
Bt Cry1Ac
parasitic diseases
Plutella xylostella
lcsh:QH301-705.5
Diamondback moth
biology
fungi
Plutella
biology.organism_classification
030104 developmental biology
Deltamethrin
lcsh:Biology (General)
Cry1Ac
Plutellidae
chemistry
Toxicity
PEST analysis
General Agricultural and Biological Sciences
010606 plant biology & botany
Subjects
Details
- ISSN :
- 1319562X
- Volume :
- 27
- Database :
- OpenAIRE
- Journal :
- Saudi Journal of Biological Sciences
- Accession number :
- edsair.doi.dedup.....8cf6e2a820ab254ba69fe684959a9c5b