Map Generation in High-Value Horticultural Integrated Pest Management: Appropriate Interpolation Methods for Site-Specific Pest Management of Colorado Potato Beetle (Coleoptera: Chrysomelidae)

Colorado potato beetle (CPB) is the most notorious and problematic insect defoliator pest of potato. It is well known for its ability to develop resistance to chemical insecticides, so novel treatment methods must be developed. A possible solution is the application of newer groups of insecticides (biotechnical and biological insecticides) which are more selective and to which resistance has not yet been recorded. This work investigated the use of ecologically acceptable insecticide treatments: azadirachtin, spinosad and spinetoram, and their combinations against CPB larvae in laboratory and field conditions. Reduced dosing and combinational treatments were used to determine if effective protection against CPB could be achieved while also improving economic results. Our results from laboratory trials showed that combinations of low-dose azadirachtin (25%) and low-dose spinetoram (5%) are suitable for use in CPB integrated pest management. The results of the field trial showed that the use of 50% reduced dosage of spinosad and spinetoram resulted in high efficacy (89–99%) and can be recommended as a treatment method that provides effective control of CPB, improved economic results, and a positive environmental impact. Based on the advantages that these treatments offer compared to chemical insecticides, further work is recommended to determine if these combinational treatments used in other dosages or in combinations with some other ecologically acceptable insecticides can provide satisfactory control of CPB.

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Site-Specific Integrated Pest Management for High-Value Crops: Impact on Potato Pest Management

Journal of Economic Entomology ◽

10.1093/jee/89.2.501 ◽

1996 ◽

Vol 89 (2) ◽

pp. 501-509 ◽

Cited By ~ 35

Author(s):

Randall Weisz ◽

Shelby Fleischer ◽

Zane Smilowitz

Keyword(s):

Integrated Pest Management ◽

Pest Management ◽

Site Specific

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Susceptibility of Seven Tomato Varieties to Spodoptera littoralis (Lepidoptera: Noctuidae) and Colorado Potato Beetle (Coleoptera: Chrysomelidae) Leaf Infestation

HortScience ◽

10.21273/hortsci.31.4.570c ◽

1996 ◽

Vol 31 (4) ◽

pp. 570c-570

Author(s):

George F. Antonious ◽

Matthew E. Byers ◽

John C. Snyder ◽

Douglas L. Dahlman

Keyword(s):

Lycopersicon Esculentum ◽

Feeding Behavior ◽

Pest Management ◽

Colorado Potato Beetle ◽

Leptinotarsa Decemlineata ◽

Spodoptera Littoralis ◽

Crop Varieties ◽

Potato Beetle ◽

Lepidoptera Noctuidae ◽

Insect Attack

The development and deployment of crop varieties that resist or tolerate insect attack is one tactic of pest management that can eliminate one or more spray applications per season, a significant savings to the grower. Seven tomato, Lycopersicon esculentum Mill. cultivars (Marmand, Edkawy, VF-145, GS-27, Pakmore-B, Flordade, and UCX) were evaluated under greenhouse conditions for differences in mortality and feeding behavior (leaf-area ingested) of the 4th instar larvae of Spodoptera littoralis (Boisd) and the Colorado potato beetle, Leptinotarsa decemlineata (Say). The most resistant cultivars to S. littoralis during two summer seasons, 1990 and 1991, were Edkawy and UCX (37% mortality) and VF-145 (33% mortality). Mortality was least (20%) on the F1 hybrid GS-27, indicating that GS-27 was the most favorable cultivar for S. littoralis. L. decemlineata larvae reared on excised tomato leaflets of the same varieties indicated similar trends. Factors responsible for greater resistance of Edkawy and UCX to S. littoralis and L. decemlineata are under investigation.

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