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Plant Pathology, Disease Control of Fruit and Vegetables

Late Blight: A Serious Disease of Potatoes and Tomatoes

Late blight is a plant disease that mainly attacks potatoes and tomatoes, although it can sometimes be found on other crops, weeds and ornamentals in the same botanical family (Solanaceae). Other plants that late blight may infect include petunia, nightshades, and tomatillos. Late blight was a...
Abby Seaman
Rosemary Loria
William Fry
Thomas Zitter
Cornell University Cooperative Extension

Downy mildew “look-alike” symptoms on cucumber

Photos: Angular leaf spot Anthracnose Herbicide damage Heat stress Alternaria on Cucumber Anthracnose on Cucumber (Colletotrichum orbiculare) Phytophthora capsici on Cucumber Septoria on Cantaloupe
Mary K. Hausbeck
Michigan State University

Aplicación de los Sistemas Blitecast y Tomcast en el Manejo del Tizón Tardío, Phytophthora infestans (Mont.) de Bary, en Papa (Solanum tuberosum L.) y Tomate (Lycopersicon esculentumMill.) en el Norte de Sinaloa, México

En los ciclos agrícolas 1991-92 y 1992-93 se pronosticó el primer brote del tizón tardío mediante el sistema Blitecast, a partir de tubérculos artificialmente infectados con Phytophthora infestans. Posteriormente, el sistema se validó a nivel semicomercial...
Rubén Félix Gastélum
Carlos Alberto Gálvez Figueroa
Rodolfo Trinidad Correa
Revista Mexicana de Fitopatología

Disease Management in High Tunnels

In Minnesota, high tunnel use provides a simple and effective way of protecting crops from low temperatures in both spring and fall, thereby extending our relatively short growing season for an additional one to two months. Without question, the primary benefit of using high tunnels is earliness....
Janna L. Beckerman
University of Minnesota

Tomato Spotted Wilt Virus on Peanuts

In the last decade, tomato spotted wilt virus (TSWV) has become widely distributed across Alabama on many field, vegetable, and floral crops. About 300 plant species, mainly broadleafs, are hosts of TSWV. In addition to peanut, other important crops grown in the Southeast that are susceptible to...
Austin Hagan
Ron Weeks
Alabama Cooperative Extension System

Antifungal activity and ultrastructural alterations in Pseudocercospora griseola treated with essential oils

  Pseudocercospora griseola, the etiologic agent of angular leaf spot of common bean (Phaseolus vulgaris), is an important disease in all bean-producing regions worldwide and may cause extremely high yield losses. The control of this disease is made more difficult by the pathogen’s...
Julián Mauricio Ágredo Hoyos
Eduardo Alves
Luciane Cristina Rozwalka
Elaine Aparecida de Souza
Walmes Marques Zeviani
Ciência e Agrotecnologia

Resistance of several strawberry cultivars against three different pathogens

In addition to the agronomical characteristics of strawberries (Fragaria ×ananassa Duch.), strawberry breeding programs should take into account its resistance to pathogens. The main goal of this study was to evaluate the resistance of strawberry cultivars against crown and root rot caused...
R. M. Pérez-Jiménez
A. De Cal
P. Melgarejo
J. Cubero
C. Soria
T. Zea-Bonilla
I. Larena
Spanish Journal of Agricultural Research

Pseudomonas syringae pv. actinidiae on surfaces in the orchard

A kiwifruit orchard that had tested positive for virulent Pseudomonas syringae pv. actinidiae (Psa-V) ca 2 km from the incursion detected in November 2010 was sampled on 13 December 2011, when the weather was overcast with some showers. Surfaces on people (hands, soles of footwear, clothing),...
K.R. Everett
I.P.S. Pushparajah
M.J. Vergara
New Zealand Plant Protection Society

Florida Plant Disease Management Guide: Eggplant

Specific Common Diseases: Bacterial Wilt (Ralstonia solanacearum) Damping-Off (Fusarium spp., Pythium spp., Rhizoctonia solani) Early Blight (Alternaria solani) Phomopsis Blight (Phomopsis vexans) Phytophthora Blight (Phytophthora nicotianae and other Phytophthora spp.) Pythium...
Shouan Zhang
Ken Pernezny
Aaron Palmateer
University of Florida, IFAS
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Guidelines for Developing an Effective Fungicide Spray Program for Wine Grapes in Maryland

The purpose of this fact sheet is to help wine grape growers in Maryland develop effective fungicide spray programs to manage a complex of five major fungal diseases affecting vines and fruit: powdery mildew, downy mildew, black rot, Botrytis bunch rot, and Phomopsis cane and leaf spot. The spray...
Anne DeMarsay
University of Maryland