Seasonal Abundance and Within-Plant Distribution of Aphids (Homoptera: Aphididae) on Flue-Cured Tobacco

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The seasonal abundance and within-plant distribution of Myzus nicotianae Blackman, an aphid closely related to Myzus persicae (Sulzer),was examined in field-grown flue-cured tobacco, Nicotiana tabacum L., from 1982 to 1984. Population density remained very low for 6-7 wk after transplant, then began a rapid growth phase. Densities dropped dramatically following the side-dress application of diphenamid (an amide herbicide), then began the rapid growth phase again. The maximum density of aphids per plant occurred in early July and varied from 300 to 2,300 per plant. Aphid densities dropped rapidly after topping plants and with initiation of sucker control chemical applications (fatty alcohols and maleic hydrazide). Within-plant distribution of aphids was not uniform. Aphids were most abundant in the middle one-third of the plant; however, aphid densities (aphids per em2) were highest on the leaves in the upper one-third of the plant.

Document Type: Research Article

Publication date: February 1, 1989

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