Scouting should be used to monitor your fields for the presence of diseases and pests or any potential issues that could hamper the growth of your vegetable crop. Plant analysis plays a crucial role in determining what is wrong with your crops. Basic principles include avoidance, exclusion, use of resistant varieties, accurate pathogen diagnosis, and pathogen reduction. Preventative plant disease management tactics are the best approach to manage diseases. Penn State Extension’s Identifying Potato Diseases in Pennsylvania publication contains color photos to help determine what diseases are affecting your potato crops. There are distinct symptoms you can look for if you want to identify vegetable diseases. Early blight, caused by the fungus Alternaria solani, is a common problem for potato growers, particularly in warm weather regions that alternate between dry and wet. Leaf mold can cause problems when you grow tomatoes in high tunnels. Timber rot, also known as Sclerotinia or white mold, can be a problem if air circulation and moisture retention are poor. There are several common vegetable diseases that growers should be aware of. A variety of symptoms, including moldy coatings, wilting, blotches, scabs, rusts, and rot typically characterize plant diseases. Wet weather, poor drainage, or inadequate airflow often encourages them. Much the same as pests, diseases can be responsible for a great deal of damage. Vegetable diseases take their energy from the plants on which they thrive. Penn State Extension also regularly publishes PestWatch Reports and Pennsylvania Vegetable Disease Updates in this section. Find tips on dealing with worms, maggots, leaf miners, beetles, and mites, and scouting for pests. Make use of Penn State Extension’s comprehensive library of resources including recommendations for managing pests and diseases for vegetables such as tomatoes, potatoes, onions, asparagus, squash, peppers, and many more. For the home gardener, they can be an inconvenience, but for commercial vegetable producers, they can be catastrophic. Pests and diseases can have a far-reaching effect on vegetable crops.
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