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Results 1 - 10 from 19 for aphid populations in 0.271 sec.

Papers - CO2 January 2004
Carbon dioxide exchange in the Sundarban mangroves, India Newman Elevated carbon dioxide, climate change and aphid populations Pan et al. Potential for carbon storage and sequestration in Chinese paddy soils Williams et ...
www.ghgonline.org

Operations Forum
Steve Lane, superintendent of the Millinocket Wastewater Treatment Facility, conducted the second course on physical ...
www.lagoonsonline.com

A Guide to the Biological Control of Greenhouse Aphids
Where aphid populations are low initially. the second generation may control the aphids adequately If aphid populations are high (numerous aphids on every plant ... 0C7. 1979. Harris, K.M. Aphidophagous cecidomyiidae (Diptera) taxonomy, biology and assessments of field populations. Bulletin Ent. Research, 63:305-325, 1973. Jordan, William H. Jr., Window Sill ...
www.eap.mcgill.ca

Cypress aphid - Cinara cupressi
The cypress aphid is also a threat to pencil cedar. The aphid is a brownish soft-bodied insect, often with a grey waxy ... on the severity and duration of the aphid infestation. The aphid populations and resulting tree damage appear more prominent during dry seasons. Cypress aphid damage in Kenya Cypress aphid Based upon: Pest Watch: Integrated Forest ...
easternarc.org

UC IPM Information about Monitoring for Potato Aphid and Tomato Fruitworm on Tomato
Pests UC Pest Management Guidelines | More pests | More crops | About guidelines | Tomato Monitoring for Potato Aphid and Tomato Fruitworm (Reviewed 1/07, updated 1/07) In this Guideline: Important links ... If the proportion of mummies is increasing or predators appear to be gaining control and aphid populations are not yet damaging, avoid sprays that will disrupt these natural enemies. If less than ...
www.ipm.ucdavis.edu

UC IPM: UC Management Guidelines for Green Peach Aphid and Other Early-season Aphids on Tomato
These aphids do not ... fly larvae. Populations of green peach aphids are reduced in winter by a parasitic fungus, Entomophthora aphidis. Many materials available for aphid control are highly disruptive of natural enemy populations. Make ...
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Solving Nuisance Ant Problems Without Pesticides
Ants help control numerous insect populations. They have been called "the foremost predators" and are superb scavengers. Because many ants build ... Reduce the numbers of these insects on trees and shrubs near your house. (See "Managing Aphid Problems without Pesticides" JPR 24(1):8-9) Consider removing plants that host these insects ...
www.pesticide.org

Aphids
Preventing Aphid Problems: Planting Tips It pays to think about aphid problems when you're putting ... pesticides. However, we realize you may find use of aphid pesticides necessary. If so, consider insecticidal soaps, recommended by ... populations of many aphids attacking leaves of fruit trees or ornamental trees and shrubs do not cause long-term damage. Low populations ...
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U.S. Global Change Research Information Office
Other examples abound. The balsam woolly adelgid, a European aphid, has killed almost all firs, once a dominant tree at higher elevations of the Great ... other Pacific islands in a futile attempt to control the giant African snail, has devastated populations of several native Hawaiian snails. The mosquito fish (Gambusia affinis and G. holbrooki ) has been ...
gcrio.org

Biological Control Methods for Pests in Commercial Greenhouses
Shortly after organophosphorus pesticides were introduced, pesticide-resistant spider mite populations appeared. This prompted researchers in the Netherlands to begin ... populations persistently decimated greenhouse aphid cultures being kept for research. It was obvious then that the Aphidoletes were more effective than the insects under investigation. Growers in Finland now routinely use the aphid ...
www.eap.mcgill.ca