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Full-Text Articles in Agriculture
Stimulatory And Suppressive Effects Of Novaluron On The Colorado Potato Beetle Reproduction., Andrei Alyokhin, Ryan Guillemette, Raymond Choban
Stimulatory And Suppressive Effects Of Novaluron On The Colorado Potato Beetle Reproduction., Andrei Alyokhin, Ryan Guillemette, Raymond Choban
Andrei Alyokhin
The Colorado potato beetle, Leptinotarsa decemlineata (Say), is one of the most damaging insect pests of potato. Novaluron is a relatively new benzoylphenyl urea insect growth regulator with good activity against this pest. Earlier studies revealed that feeding on potato foliage treated with novaluron induces reversible egg hatch inhibition in adult Colorado potato beetles. We investigated if novaluron effects depend on physiological state of the beetles at the time of exposure. The following four treatments were created: young beetles unmated at the beginning of the experiment and feeding on potato foliage treated with novaluron, young beetles unmated at the beginning …
Persistence And Inheritance Of Costs Of Resistance To Imidacloprid In Colorado Potato Beetle, Mitchell Baker, Andrei Alyokhin, Adam Porter, David Ferro, Shana Dastur, Nehal Galal
Persistence And Inheritance Of Costs Of Resistance To Imidacloprid In Colorado Potato Beetle, Mitchell Baker, Andrei Alyokhin, Adam Porter, David Ferro, Shana Dastur, Nehal Galal
Andrei Alyokhin
Reduced fitness among resistant versus susceptible individuals slows resistance evolution and makes it easier to manage. A loss of resistance costs could indicate novel adaptations or mutations contributing to resistance. We measured costs of resistance to imidacloprid in a Massachusetts resistant population compared with a Massachusetts susceptible population in 1999 in terms of fecundity, hatching success, egg development time, and sprint speed. Resistance was additive and seemed to be polygenic with high heritability. The fecundity cost appeared overdominant in 1999, and the hatch rate cost was partly recessive in 1999, but neither was signiÞcantly different from dominant or recessive. In …
Susceptibility Of Imidacloprid-Resistant Colorado Potato Beetles To Non-Neonicotinoid Insecticides In The Laboratory And Field Trials., Andrei Alyokhin, Galen Dively, Megan Patterson, David Rogers, John Wollam
Susceptibility Of Imidacloprid-Resistant Colorado Potato Beetles To Non-Neonicotinoid Insecticides In The Laboratory And Field Trials., Andrei Alyokhin, Galen Dively, Megan Patterson, David Rogers, John Wollam
Andrei Alyokhin
Repeated use of neonicotinoid insecticides has resulted in the first reported cases of Colorado potato beetle (Leptinotarsa decemlineata (Say)) resistance to imidacloprid. In the laboratory we determined susceptibility of the imidacloprid-resistant Colorado potato beetles from a population in Southern Maine to other insecticides currently registered for use on potato. This population was about 30-fold resistant to imidacloprid and could not be effectively controlled by its applications. Control mortality was significantly higher for the imidacloprid-resistant larvae than for the susceptible larvae, suggesting that fitness disadvantages may be associated with the resistance trait. Resistant larvae exhibited significantly less mortality than susceptible larvae …