Colorado potato beetle resistance

Potato Monsanto/1994 CrylllA protein Bacillus thuringiensis subsp. tenebrionis (Btt) Resistance to Colorado potato beetle... 

Bamberg, J. B., Longtine, C., Radcliffe, E. B. (1996). Fine screening Solanum (potato) germplasm accessions for resistance to Colorado potato beetle. American Journal of Potato Research, 73, 211-223. 

Kim, H.J., Hawthorne, D.J., Peters, T., Dively, G.P., and Clark, J.M., Application of DNA-based geno-typing techniques for the detection of kdr-like pyrethroid resistance in field populations of Colorado potato beetle, Pestic. Biochem. Physiol., 81, 85, 2005. 

Carter, C. (1987). Difference in pyrethroid efficacy among Solatium clones resistant and susceptible to Colorado potato beetle. Am, Potato J. 4,432. 

Other cases where resistance has reached crisis proportions include Colorado potato beetle on Long Island, New York (3.) and diamondback moth in Southeast Asia (24). 

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... 

However, the most difficult issue surrounding control of the Colorado potato beetle (CPB) has been the insea s ability to rapidly develop resistance to all major classes of... 

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. 

Implicated In arthropod resistance. This paper will describe the known effects of these compounds on selected insect pests of tomato and describe some of complexities Involved in manipulating the presence and amounts of these chemicals in the tomato plant to enhance the level of Insect resistance. Emphasis will be on three insect species for which the greatest amount of information is available the tobacco hornworm, Manduca next a L. the tomato fruitworm, Hellothls zea (Boddle), and the Colorado potato beetle Leptlnotarsa decemlineata (Say). 

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). 

Heinman et al. (1970) concluded from their experiments that DDT inhibits pyruvate oxidation and phosphorylation reactions in the mitochondria of the insects. In the natural DDT resistance of certain insect species, the resistance of mitochondrial oxidative phosphorylation to DDT may be significant. According to Sestovic and Peric (1974), the resistant strains of Colorado potato beetle metabolise DDT considerably faster than the strains susceptible to DDT. 

Such subde effects of the trichome barrier might explain our recent finding that feeding is a much smaller portion of the activity budget of Colorado potato beetle larvae on S. berthaultii than on non-glandular susceptible cultivars (Table V) (34) and thus provide an explanation for several of the major impacts of resistance on this pest, i.e. decreased food consumption leads to the reduced growth rates, retarded development, and their cumulative suppressive effects on survival, fecundity, and population dynamics. 

Clones selected from these hybrid populations have demonstrated excellent levels of resistance to aphids, leafhoppers, and the Colorado potato beetle in field and laboratory studies. We have demonstrated season-long reduction in aphid populations on hybrid clones of up to 60%, compared with populations on commercial cultivars (17.411. We have also demonstrated population reductions of leafhopper adults and nymphs of over 80% on hybrid clones, compared to those on commercial susceptible potato cultivars (221. This level of resistance eliminates the... 

Tridecanone also conditions resistance to the Colorado potato beetle, Leptinotarsa decemlineata (Say), causing mortality of young larvae which disrupt the glandular trichomes (47-51), PI 134417 also possesses factors associated with leaf lamellae that kill decemlineata larvae during the late instars. These factors are mechanistically distinct from 2-tridecanone-mediated resistance (51-52),... 

Kennedy, G. G. and C. E. Sorenson. 1985, Role of glandular trichomes in the resistance of Lycopersicon hirsutum f, glabratum to Colorado potato beetle (Coleoptera Chrysomelidae). J. Econ. Entomol. 78 547-551. 

Mechanisms of resistance to Colorado potato beetle in tomato. 

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. 

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