Colonization of Three Species of Aphid on Two Types of Locally Grown Lettuce

Overview

Objectives/Goals To observe the colonization of three aphid species on a lettuce head. Thus determining,if possible, an effective eradication treatment. Methods/Materials Materials:Eighteen, two-month old lettuce plants(9-iceberg, 9-romaine) Eighteen seclusion cages(Glass-panel/canvas) 180 Aphids(60-species A, 60-species B, 60 species C) Method: Three plant groups(3-iceberg, 3-romaine)were infected by a separate aphid species and each individual plant placed in a seclusion cage. Colonization pattern was observed once per week over a three week period. Results Two species of aphids(Nasonovia-ribis-nigri, Acyrothosiphon-lactucae) preferred to colonize in or very near the center or core of the lettuce leaves. Only Myzus-persicae preferred the outer leaves. Conclusions/Discussion My conclusion is that because both Nasonovia ribis-nigri and Acyrthosiphon lactucae prefer the inner leaves of lettuce plants, eradication with insecticides won't be effective, however Myzus persicae is still vulerable to and can be killed with insecticide.

Competition history

• CSEF 2005 Zoology · Entry S1915

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