Effect of viruses on photosynthesis
Diseases Control Guide

Effect of viruses on photosynthesis

The most obvious symptom of systemic virus infection is the mosaic pattern of the leaves. Yellowing, chlorosis is also frequent and characteristic sign of the altered photosynthetic activity. Virus in...
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Pesticides and Vegetable Disease Control
Diseases Control Guide

Pesticides and Vegetable Disease Control

Fungicides can be a great help in preventing diseases when properly applied to the plant foliage. Since fungicides are preventive, they should be applied before the disease occurs, or as soon as the f...
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Bacterial Leaf Spot
Diseases Control Guide

Bacterial Leaf Spot

Bacterial Leaf Spot Cause. Xanthomonas campestris pv. alfalfae (syn. X. alfalfae and Phytomonas alfalfae) survives in infected residue that has been incorporated into soil or is lying on the soil
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Alfalfa Sprout Rot
Diseases Control Guide

Alfalfa Sprout Rot

Alfalfa Sprout Rot Cause. Erwinia chrysanthemi survives for up to 2 weeks on inoculated dried seeds. Air, the water supply, or greenhouse workers may introduce bacteria into a sprouting house. Sp
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Diseases Control Guide

Establishing the Cause of Disease

The correct diagnosis of a plant disease and its cause is not always an easy task. In the first instance symptoms may be ill defined which make their association with any organism problematic (Derrick
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