Colorado potato beetle, insecticidal resistance

In this paper, the use of Bt -based insecticides as tools for controlling insects resistant to synthetic insecticides will be explored through a review of the development of two very different Bt based products M-One Insecticide, based on the naturally occurring Bt variety son diego controls the Colorado potato beetle, a pest that has... 

Unique Mode of Action. As described above, the Bt delta endotoxin is a stomach poison which acts on the midgut epithelial cells of susceptible insects. This is in contrast to the typical mode of action for synthetic chemical insecticides, which act as nerve poisons. Because the Bt site of action is so different from that of synthetic insecticides, Bt has been successfully utilized for control of otherwise resistant insects such as mosquitoes, the diamondback moth and the Colorado potato beetle. 

Potatoes bearing glandular trichomes also defend against the Colorado potato beetle, a devastating pest capable of total crop destruction (4). Although resistance will not eliminate the need for other control tactics in management of this pest, our field experience indicates that present levels of resistance in hybrids can substitute for as much as 40% of the current insecticide usage on susceptible cultivars (14). 

Kennedy, G. G. and R. R. Farrar, Jr. 1987. Response of insecticide-resistant and susceptible Colorado potato beetles, Leptinotarsa decemlineata to 2-tridecanone and resistant foliage the absence of cross resistance. Entomol. Exp. Appl. 45 187-192. 

Sevin is a effective insecticide for the Mexican bean larva and adults, bean aphids, armyworms, German roaches, rice weevil. Eastern caterpillars, milkweed bug and Colorado potato beetle. Sevin is a particularly effective insecticide, possessing a combination of desirable properties. Its broad spectrum of activity, its long residual action, and its effectiveness against insects which are resistant to many common types of Insects and its low mammalian toxicity combine to make it one of the most outstanding insecticides ever developed. 

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