Efficacy Assessment of Aphidius Colemani (Hymenoptera: Braconidae) for Suppression of Aphis Gossypii (Homoptera: Aphididae) in Greenhouse-grown Chrysanthemum.
From: Department of Entomology, North Carolina State University, Gardner Hall, Box 7613, Raleigh, NC 27695, USA.
Journal of economic entomology
- Publish Date: Aug 2006
- ISSN: 0022-0493
- Volume: 99
- Issue: 4
- Pages: 1104-11
- Medium: Print
- Language: English
- Citation (JAMA): Vásquez Gissella M, Orr David B, Baker James R, et al. Efficacy Assessment of Aphidius Colemani (Hymenoptera: Braconidae) for Suppression of Aphis Gossypii (Homoptera: Aphididae) in Greenhouse-grown Chrysanthemum.. J. Econ. Entomol. Aug 2006;99:1104-11
Abstract
To assess biological control as a management tool for the cotton aphid, Aphis gossypii Glover (Homoptera: Aphididae), the efficacy of Aphidius colemani Viereck (Hymenoptera: Braconidae) for suppression of A. gossypii in greenhouse-grown chrysanthemums, Dendranthema grandiflora (Tzvelev), was compared with a pesticide standard, imidacloprid (Marathon 1% G) and an untreated check. No significant differences were found between aphid populations in the two treatments. A. colemani and imidacloprid kept aphid numbers very low, with the correspondent aphid populations exhibiting very low intrinsic rates of increase (r(m) = -0.0369 and r(m) = 0.0151, respectively), in contrast to the exponential growth of aphid populations (r(m) = 0.1085) observed on the untreated plants. Parasitism levels in A. colemani plots ranged from 48.93 to 83.38%. Esthetic damage parameters, including exuviae, honeydew, and sooty mold on leaves, were significantly different between treatments and untreated control, and damage levels were minimal with the insecticide treatment and natural enemy releases. The cost of A. colemani releases was 4.7 times greater than the cost of the imidacloprid treatment.
Mesh Headings (Keywords): Animals, Aphids, Chrysanthemum, Host-Parasite Interactions, Imidazoles, Insecticides, Nitro Compounds, Pest Control, Biological, Wasps
Check for Full Text / PubMed Unique Identifier (PMID): 16937661
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