Plant Pathology, Disease Control of Fruit and Vegetables

Damping-off and Root Rot of Beans

Root rots, damping-off before and after seedling emergence, and seed rots are destructive diseases of green, snap, lima, and dry beans. These diseases are caused primarily by soilborne fungi. Significant losses may occur to susceptible varieties, especially if cool, wet weather conditions prevail...
Sally A. Miller
Richard M. Riedel
Randall C. Rowe
The Ohio State University

Cucurbit downy mildew photos

Downy Mildew on Cucumber Downy mildew symptoms on cucumber Downy Mildew Symptoms on Other Crops
Mary K. Hausbeck
Michigan State University

Identifying the Cause of Rot in Black Truffles and Management Control Options

Truffles are the fungal fruiting bodies of ectomycorrhizal fungi belonging to the genus Tuber. In Australia the industry is dominated by one species, the French black truffle (Tuber melanosporum), which is highly prized in the gourmet world for its unique aroma. Current production in Australia has...
Harry Eslick
Rural Industries Research and Development Corporation, RIRDC Australia

Tomato Disorders Gray Wall (Blotchy Ripening)

Affected green fruit have large patches of hard, grayish or yellowish tissue. The affected fruit appears to be poorly ripened or to have ripened at an uneven rate with some patches remaining gray or turning yellow. Inside the fruit, there is uneven coloration of tissue with some areas having a...
Ray Cerkauskas
AVRDC – The World Vegetable Center

Late Blight of Potatoes and Tomatoes

Late blight of potatoes and tomatoes, the disease that was responsible for the Irish potato famine in the mid-nineteenth century, is caused by the fungus-like oomycete pathogen Phytophthora infestans. It can infect and destroy the leaves, stems, fruits, and tubers of potato and tomato plants....
William E. Fry
Cornell University

Cane Blight of Blackberry

Cane blight can be a major disease of blackberry in the Southeast, resulting in severe losses ‐ sometimes causing the complete destruction of fruiting canes in any given year. It is generally not reported in other states as a major disease of blackberries, except when winter injury occurs on...
Phillip M. Brannen
Gerard Krewer
The University of Georgia and Ft. Valley State University

Florida Plant Disease Management Guide: Beans

Symptoms and cultural controls for specific common diseases: Alternaria Leaf and Pod Spot (Alternaria spp.) Anthracnose (Colletotrichum lindemuthianum ) Ashy Stem Blight (Macrophomina phaseolina ) Bacterial Blights (Xanthomonas campestris pv. phaseoli, Pseudomonas syringae pv....
Shouan Zhang
Aaron Palmateer
Ken Pernezny
University of Florida, IFAS

Florida Plant Disease Management Guide: Chemical Control Guide for Diseases of Vegetables, Revision No. 21

This publication is a guide to lawful use of sprayable chemicals intended for control of plant diseases affecting vegetables grown in Florida. For each crop, products are listed by FRAC code in alphabetical order to help differentiate products based on their active ingredient(s) and their specific...
Gary Vallad
Ken Pernezny
Natalia Peres
Richard Raid
Pam Roberts
Shouan Zhang
University of Florida, IFAS

Crop rotation and genetic resistance reduce risk of damage from Fusarium wilt in lettuce

Fusarium wilt of lettuce, caused by the soilborne fungus Fusarium oxysporum f. sp. lactucae, affects all major lettuce production areas in California and Arizona. In trials at UC Davis, we found that lettuce cultivars differ significantly in susceptibility to the disease, with some leaf and...
Jeness C. Scott
Thomas Gordon
Sharon C. Kirkpatrick
Steven T. Koike
Michael E. Matheron
Oswaldo E. Ochoa
Maria J. Truco
Richard W. Michelmore
California Agriculture

Seguimiento de plagas y enfermedades

Existen dos procedimientos básicos para el seguimiento de plagas y enfermedades en las empresas uno de ellos es el monitoreo y el otro es el rastreo o scouting. El monitoreo se usa principalmente cuando son problemas muy conocidos, estables en la finca y cuando se desea llevar una observaci...
Alfredo Durán Quirós
Dennis Mora Acedo
Universidad de Costa Rica