Aphids

Insinga, J.K., A. Alyokhin, J. Hao, T. Ge, N. F. Marangoni, A. Baron. 2021. Dickeya dianthicola is not vectored by two common insect pests of potato. PhytoFrontiers 1: 160-172. https://doi.org/10.1094/PHYTOFR-12-20-0049-R

Abundance Factors / ,

Dickeya dianthicola (Samson) is an important pathogen causing blackleg disease of potato. Previous work suggested that insects might vector species of Pectobacteriaceae between plants but no conclusive work has confirmed this. Green peach aphids (Myzus persicae Sulzer) and Colorado potato beetles (Leptinotarsa decemlineata Say) are aggressive potato pests and related to known vectors of several […]

Insinga, J.K., A. Alyokhin, J. Hao, T. Ge, N. F. Marangoni, A. Baron. 2021. Dickeya dianthicola is not vectored by two common insect pests of potato. PhytoFrontiers 1: 160-172. https://doi.org/10.1094/PHYTOFR-12-20-0049-R Read More »

Galimberti, A., A. Alyokhin, H. Qu, and J. Rose. 2020. Simulation modelling of Potato virus Y spread in relation to initial inoculum and vector activity. Journal of Integrative Agriculture 19: 376-388.

Viruses /

 Potato virus Y (PVY) is a non-persistent virus that is transmitted by many aphid species and causes significant damage to potato production. We constructed a spatially-explicit model simulating PVY spread in a potato field and used it to investigate possible effects of transmission efficiency, initial inoculum levels, vector behavior, vector abundance, and timing of peak

Galimberti, A., A. Alyokhin, H. Qu, and J. Rose. 2020. Simulation modelling of Potato virus Y spread in relation to initial inoculum and vector activity. Journal of Integrative Agriculture 19: 376-388. Read More »

Galimberti, A. and A. Alyokhin. 2018. Lethal and sublethal effects of mineral oil on potato pests. Journal of Economic Entomology 111: 1261-1267.

Insecticides, Viruses / ,

Mineral oil is a product used to reduce Potato Virus Y transmission in potato fields. However, there is little information available about other effects that oil may have on insect pests of potato. To better understand how mineral oil affects potato pests, we performed a series of experiments testing the effects of oil on mortality,

Galimberti, A. and A. Alyokhin. 2018. Lethal and sublethal effects of mineral oil on potato pests. Journal of Economic Entomology 111: 1261-1267. Read More »

Alpuerto, J. B., A. Mukherjee, A. Kitazumi, A. Alyokhin, D. De Koeyer, and B. G. de los Reyes. 2017. Impaired expression of the beta and delta isoforms of vacuolar processing enzymes compromise the basal defenses of Arabidopsis thaliana against the phloem-feeding insect Myzus persicae. Acta Physiologiae Plantarum 39: 233. https://doi.org/10.1007/s11738-017-2529-z

Abundance Factors /

While the functions of vacuolar processing enzymes (VPE) in plant responses to pathogens are now better established, their possible roles against insect herbivores need validation. Inspired by an observation that betaVPE and deltaVPE represent the most highly upregulated transcripts in leaves of Solanum bulbocastanum and its backcross progenies that were highly resistant to the phloem-feeding

Alpuerto, J. B., A. Mukherjee, A. Kitazumi, A. Alyokhin, D. De Koeyer, and B. G. de los Reyes. 2017. Impaired expression of the beta and delta isoforms of vacuolar processing enzymes compromise the basal defenses of Arabidopsis thaliana against the phloem-feeding insect Myzus persicae. Acta Physiologiae Plantarum 39: 233. https://doi.org/10.1007/s11738-017-2529-z Read More »

Lamb, R. J., P. A. MacKay, and A. Alyokhin. 2013. Seasonal dynamics of three coexisting aphid species: implications for estimating population variability. Canadian Entomologist 145: 283-291.

Abundance Factors /

Seasonal patterns of abundance and population variability were determined for Macrosiphum euphorbiae (Thomas), Myzus persicae (Sulzer), and Aphis nasturtii (Kaltenbach) (Hemiptera: Aphididae) in potato plots from weekly samples for 28 years. All species showed a single annual peak, but arrived and reached peak abundance at different times. Population variability (PV, a proportion between 0 and 1) for the week of peak

Lamb, R. J., P. A. MacKay, and A. Alyokhin. 2013. Seasonal dynamics of three coexisting aphid species: implications for estimating population variability. Canadian Entomologist 145: 283-291. Read More »

Leppanen, C., A. Alyokhin, and S. Gross. 2012. Competition for aphid prey between different lady beetle species in a laboratory arena. Psyche: A Journal of Entomology 2012: Article ID 890327, 9 pp.

Abundance Factors / ,

Direct competition for aphid prey (Hemiptera: Aphididae) was evaluated between and among several lady beetle species (Coleoptera: Coccinellidae). The behavior of three native (Coccinella trifasciata, Coleomegilla maculata, and Hippodamia convergens) and four nonnative (Coccinella septempunctata, Harmonia axyridis, Hippodamia variegata, and Propylea quatuordecimpunctata) lady beetles was observed in laboratory arenas. The beetles were kept alone, paired with conspecifics or paired

Leppanen, C., A. Alyokhin, and S. Gross. 2012. Competition for aphid prey between different lady beetle species in a laboratory arena. Psyche: A Journal of Entomology 2012: Article ID 890327, 9 pp. 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 »

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 »

Narayandas, G. and A. Alyokhin. 2006. Diurnal patterns in host finding by potato aphids, Macrosiphum euphorbiae (Homoptera: Aphididae). Journal of Insect Behavior 19: 347-356.

Abundance Factors /

Potato aphid, Macrosiphum euphorbiae (Homoptera: Aphididae), is an abundant potato pest and vector of potato leaf-roll virus and potato virus Y in Maine and other potato growing areas. We investigated the circadian rhythmicity of its movement towards host plant odor. Effects of daily cycle (day or night) and illumination (light or dark) on the proportion of aphids

Narayandas, G. and A. Alyokhin. 2006. Diurnal patterns in host finding by potato aphids, Macrosiphum euphorbiae (Homoptera: Aphididae). Journal of Insect Behavior 19: 347-356. Read More »