2017 Fungicide Spray Guides for Tomato and Pepper in North Carolina
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There are several foliar diseases of tomato in North Carolina that predictably occur each growing season, including bacterial leaf spot, early blight, and late blight. As a result, the nature of commercial tomato production in western North Carolina requires regular fungicide applications, yet there is no single product that provides effective control of all the foliar diseases of tomato. Additionally, the majority of the products are protective rather than systemic and, therefore, require application before disease appears. As the number of active ingredients increases and the restrictions on application timings and amounts varies across products, the chance of error and confusion in developing a program increases. The Tomato Spray Guide, developed from many years of research at North Carolina State University, is designed to provide a spray schedule that limits applications, yet maintains healthy plants and incorporates rotation of active ingredients for fungicide resistance management.
This program was originally initiated by Dr. Paul Shoemaker and further developed by Dr. Kelly Ivors; both are former Vegetable Pathologists at the Mountain Horticultural Crops Research & Extension Center in Mills River, NC.
Bell peppers in North Carolina can be severely affected by anthracnose, bacterial leaf spot, Phytophthora blight, Pythium damping off, and southern blight. Diseases of bell pepper do not occur consistently each year in NC, therefore, a weekly spray guide is not applicable. Only relative effectiveness of labeled products is provided in this guide. It is highly recommended to get an accurate diagnosis and recommendations from the NC Plant Disease & Insect Clinic before treating your crop. Always choose the fungicides based on the pests that are being targeted. Also, by alternating products in different fungicide groups for the disease, the risk of fungicide resistance development will be reduced. The relative effectiveness of each product is based on years of field research trials testing the various fungicides for managing diseases at NC State University and University of Georgia.