The biological and physiological responses of Leptinotarsa decemlineata Say (Col. Chrysomelidae) to different potato cultivars

• Published in: Pest management science Vol. 78; no. 9; pp. 3788 - 3794
• Main Authors: Golizadeh, Mahdieh, Mehrkhou, Fariba, Atlihan, Remzi, Güz, Nurper
• Format: Journal Article
• Language: English
• Published: Chichester, UK John Wiley & Sons, Ltd 01-09-2022; Wiley Subscription Services, Inc
• Subjects: Agricultural practices; Cathepsin B; Cluster analysis; Cultivars; Flavonoids; Food conversion; Growth rate; host susceptibility; Integrated pest management; Larvae; Leptinotarsa decemlineata; Nutrient content; nutritional indices; Pest control; Pest resistance; Pests; Physiological responses; Physiology; Potatoes; protease activity; secondary metabolites; Survival; protease activity; secondary metabolites; Leptinotarsa decemlineata; host susceptibility; nutritional indices
• ISSN: 1526-498X; 1526-4998
• DOI: 10.1002/ps.6814

BACKGROUND
The use of pest‐resistant or less susceptible plant varieties is of great importance for integrated pest management programs. This study was conducted to evaluate the resistance of seven potato cultivars to a major pest, namely the Colorado potato beetle (CPB), by measuring its bio‐physiological aspects.
RESULTS
The longest developmental time and the lowest survival rate of CPB were detected on cultivar ‘Manitou.’ Although the larvae fed voraciously, the food conversion efficiency was the lowest on this cultivar leading to the lowest relative growth rate. Furthermore, larvae reared on Manitou had the lowest total protease activity and specific activity values of cathepsin B compared to the larvae reared on other cultivars. Additionally, the cluster analysis showed that the Manitou cultivar was the least suitable (partially resistant) CPB. Moreover, the results indicated that the protein content was the lowest in the Manitou cultivar; conversely, this cultivar was rich in polyphenol and flavonoid compared to Agria and Santae cultivars.
CONCLUSION
The overall results in this study indicated that the Manitou cultivar might be a good candidate to be incorporated into integrated pest management programs. © 2022 Society of Chemical Industry.
Our results based on cluster analysis indicated that Manitou affected the biological and physiological properties of the Colorado potato beetle (CPB) more than the other six cultivars tested to the detriment of the pest, and it might be a good candidate for incorporating into integrated pest management programs against CPB.