Bernard, E., R. P. Larkin, S. Tavantzis, M. S. Erich, A. Alyokhin, G. Sewell, A. Lannan, and S. D. Gross. 2012. Compost, rapeseed rotation, and biocontrol agents significantly impact soil microbial communities in organic and conventional potato production systems. Applied Soil Ecology 52: 29-41.

Abundance Factors /

Cultural practices such as organic amendments, rotations, and use of biological control organisms are regularly investigated for their effects on controlling plant diseases but their effects on soil microbial populations are often unexplored. In this study, three different sustainable disease management practices, use of compost amendment, biocontrol organisms, and a potentially disease-suppressive rotation, were established […]

Bernard, E., R. P. Larkin, S. Tavantzis, M. S. Erich, A. Alyokhin, G. Sewell, A. Lannan, and S. D. Gross. 2012. Compost, rapeseed rotation, and biocontrol agents significantly impact soil microbial communities in organic and conventional potato production systems. Applied Soil Ecology 52: 29-41. Read More »

Alyokhin, A., F. A. Drummond, G. Sewell, and R. H. Storch. 2011. Differential effects of weather and natural enemies on coexisting aphid populations. Environmental Entomology 40: 570-580.

Abundance Factors /

Study of mechanisms responsible for regulating populations of living organisms is essential for a better comprehension of the structure of biological communities and evolutionary forces in nature. Aphids (Hemiptera: Sternorrhyncha) comprise a large and economically important group of phytophagous insects distributed worldwide. Previous studies determined that density dependent mechanisms play an important role in regulating

Alyokhin, A., F. A. Drummond, G. Sewell, and R. H. Storch. 2011. Differential effects of weather and natural enemies on coexisting aphid populations. Environmental Entomology 40: 570-580. Read More »

Lamb, R. J., P. A. MacKay, and A. Alyokhin. 2011. Population variability and persistence of three aphid pests of potatoes over 60 years. Canadian Entomologist 143: 91-101.

Abundance Factors /

Abundance, persistence, and variability of populations of Macrosiphum euphorbiae (Thomas), Myzus persicae (Sulzer), and Aphis nasturtii Kaltenbach (Hemiptera: Aphididae) in potato plots for intervals of 58 years (n=1), 29 years (n=2), 19?20 years (n=3), and 9?10 years (n=6) were compared. The abundance of M. euphorbiae showed no trend among decades and varied 2.4-fold, whereas that of M. persicae and A. nasturtii declined and showed 54-fold and 3700-fold

Lamb, R. J., P. A. MacKay, and A. Alyokhin. 2011. Population variability and persistence of three aphid pests of potatoes over 60 years. Canadian Entomologist 143: 91-101. Read More »

Alyokhin, A. and R. Choban. 2010. Maturity-dependent mortality of Colorado potato beetle eggs treated with novaluron. American Journal of Potato Research 87: 557-560.

Insecticides /

Novaluron is a chitin synthesis inhibitor (a benzoylphenyl urea) that kills larval stages and causes reversible cessation of laying viable eggs in adults of the Colorado potato beetle, Leptinotarsa decemlineata (Say). Previous studies also suggest that it has ovicidal properties, but not on all tested egg masses. We investigated if egg maturity at the time of exposure

Alyokhin, A. and R. Choban. 2010. Maturity-dependent mortality of Colorado potato beetle eggs treated with novaluron. American Journal of Potato Research 87: 557-560. Read More »

Finlayson, C., A. Alyokhin, S. Gross, and E. Porter. 2010. Differential consumption of four aphid species by four lady beetle species. 10pp. Journal of Insect Science 10:31, available online: insectscience.org/10.31.

Abundance Factors / ,

The acceptability of four different aphid species, Macrosiphum albifrons (Essig), Macrosiphum euphorbiae (Thomas), Macrosiphum pseudorosae Patch, and Myzus persicae (Sulzer) (Hemiptera: Aphididae), as prey for four lady beetle species, one native species Coccinella trifasciata L, and three non-native species, Coccinella septempunctata L, Harmonia axyridis Pallas, Propylea quatuordecimpunctata L (Coleoptera: Coccinellidae) were tested in the laboratory. The relative field abundance of adults of the same lady beetle species on host vegetation, Lupinus

Finlayson, C., A. Alyokhin, S. Gross, and E. Porter. 2010. Differential consumption of four aphid species by four lady beetle species. 10pp. Journal of Insect Science 10:31, available online: insectscience.org/10.31. Read More »

Alyokhin, A., J. Makatiani, and K. Takasu. 2010. Insecticide odour interference with food-searching behaviour of Microplitis croceipes (Hymenoptera: Braconidae) in a laboratory arena. Biocontrol Science and Technology 20: 317-329.

Insecticides

Response to odours plays an important role in resource location by natural enemies, particularly by parasitoid wasps. While a considerable research effort has been dedicated to studying the effects of insecticide intoxication on natural enemy search behaviour, it is yet unknown if the odours themselves interfere with distant chemoreception. We investigated this issue using the

Alyokhin, A., J. Makatiani, and K. Takasu. 2010. Insecticide odour interference with food-searching behaviour of Microplitis croceipes (Hymenoptera: Braconidae) in a laboratory arena. Biocontrol Science and Technology 20: 317-329. Read More »

Alyokhin, A., R. Guillemette, and R. Choban. 2009. Stimulatory and suppressive effects of novaluron on the Colorado potato beetle reproduction. Journal of Economic Entomology 102: 2078-2083.

Insecticides /

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

Alyokhin, A., R. Guillemette, and R. Choban. 2009. Stimulatory and suppressive effects of novaluron on the Colorado potato beetle reproduction. Journal of Economic Entomology 102: 2078-2083. Read More »

Finlayson, C. J., A. V. Alyokhin, and E. W. Porter. 2009. Interactions of native and non-native lady beetle species (Coleoptera: Coccinellidae) with aphid-tending ants in laboratory arenas. Environmental Entomology 38: 846-855.

Abundance Factors /

Interactions between lady beetles and the European fire ant (Myrmica rubra L.) tending potato aphids [Macrosiphum euphorbiae (Thomas)] were compared in the laboratory. Lady beetle species native to North America (Coccinella trifasciata perplexa Mulsant, Coleomegilla maculata lengi Timberlake, Hippodamia convergens Guerin-Meneville) and non-native species of Palearctic origin [Coccinella septempunctata L., Harmonia axyridis (Pallas), Hippodamia variegata (Goeze), Propylea quatuordecimpunctata L.)] were evaluated. Harmonia axyridis consumed a significantly greater number of aphids compared

Finlayson, C. J., A. V. Alyokhin, and E. W. Porter. 2009. Interactions of native and non-native lady beetle species (Coleoptera: Coccinellidae) with aphid-tending ants in laboratory arenas. Environmental Entomology 38: 846-855. Read More »

Alyokhin, A. 2009. Colorado potato beetle management on potatoes: current challenges and future prospects. In: Tennant P, Benkeblia N (Eds) Potato II. Fruit, Vegetable and Cereal Science and Biotechnology 3 (Special Issue 1): 10-19. (Invited review article).

Reviews /

The Colorado potato beetle, Leptinotarsa decemlineata (Say) (Coleoptera: Chrysomelidae) is the most important insect defoliator of potatoes that can completely destroy potato crops. Its current range covers about 16 million km2 in North America, Europe, and Asia and continues to expand. A complex and diverse life history, combined with an impressive ability to develop insecticide resistance, make the

Alyokhin, A. 2009. Colorado potato beetle management on potatoes: current challenges and future prospects. In: Tennant P, Benkeblia N (Eds) Potato II. Fruit, Vegetable and Cereal Science and Biotechnology 3 (Special Issue 1): 10-19. (Invited review article). Read More »