West Virginia University

Extension Service

September 2001

Dr. John F. Baniecki, Extension Specialist in Plant Pathology/Entomology,
Pest Management Program

Iowa State University Scientests Report That Catnip is an Effective Mosquito Repellent

According to Chris Peterson and Joel Coats, an essential oil (nepetalactone) found in catnip is even more active than DEET. It took about a tenth as much nepetalactone to have the same repellency as DEET in laboratory experiments. Both repellents caused mosquitoes to move away from treated areas in glass tubes.

No animal or human tests are scheduled for nepetalactone, although Peterson is hopeful that will take place in the future. Iowa State has submitted a patent application for the use of catnip compounds as insect repellents (http://www.ag.iastate.edu/aginfo/news/catnip.html)

A New Study Suggests that Carbaryl (Sevin) and Other Carbamate Insecticides Increase the Risk of non-Hodgkin's Lymphoma (NHL), a Cancer of the Lymphatic System

In the July issue of the Journal of Occupational and Environmental Medicine, researchers indicate report that farmers who used carbamate pesticides had a 30-50% increased risk of NHL compared with nonfarmers. Farmers who had not used carbamates showed no increased risk. The risk of NHL associated with carbaryl was limited to the people who handled the product for 7 or more years.

(Agromedicine Program Update, 8-15-01)

 The EPA Plans to Create a List of Pesticide Ingredients that do not Require a Food Tolerance or an Exemption from Tolerance

The chemicals on the list will be things that will not produce any residue in food. Some pesticides, such as pheromones used in traps, already have this type of exemption, but there has never been a comprehensive list published in the Code of Federal Regulations. The proposed list would ensure consistent treatment of the chemicals. You can find more information and comment at the EPA web site, www.epa.gov/pesticides

Nearly 25,000 Acres of Wheat in Arkansas and Mississippi were Illegally Sprayed with Zeta-Cypermethrin

Growers applied the pyrethroid insecticide to combat an infestation of armyworms. However, this insecticide is not labeled for wheat. The wheat cannot be sold, and the applicators face fines.

Officials are still trying to determine why so many growers used the product illegally. Some growers reported that consultants or sales representatives recommended the application. Regardless of the source of the recommendation, the applicators are still held responsible. The user is responsible for following the pesticide label. FOLLOW THE PESTICIDE LABEL.

(Pesticide & Tox. Chemical News, 8-6-01)

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The West Virginia University Cooperative Extension Service, U.S. Department of Agriculture and West Virginia counties cooperating. Equal Opportunity/Affirmative Action Institution.