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Sporangia release zoospores which require water for transport. Zoospores swim in water droplets until they encyst and infect the fruit. [6] Symptoms, beginning with fruit rot, may form within 24 hours. Chlamydospores are the pathogen's resting structure, which allows the disease to survive and overwinter in the soil.
Phytophthora infestans is an oomycete or water mold, a fungus-like microorganism that causes the serious potato and tomato disease known as late blight or potato blight. Early blight , caused by Alternaria solani , is also often called "potato blight".
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Few varieties are resistant to the disease and none are immune, so rotating susceptible plants with non-susceptible ones like cereals is a practice positive to limiting soft rot infection. The control of specific insect vectors is also a good way of controlling disease spread in the field and in storage.
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There are several examples of relative resistance mechanisms in potato. Thus, the wild potato species Solanum polyadenium, Solanum tarijense and Solanum berthaultii present "trichomes" or glandular hairs on leaves and stems, which discharge an exudate when mechanically damaged by aphids. In contact with atmospheric oxygen, the light-colored ...
Those potatoes looked like the perfect ingredients to make a big batch of mashed potatoes when you bought them last week, but now the vegetables look a little, well, unique.
Fusarium dry rot of potato is a devastating post-harvest losses (vegetables) disease affecting both seed potatoes and potatoes for human consumption. [3] Dry rot causes the skin of the tuber to wrinkle. The rotted areas of the potato may be brown, grey, or black and the rot creates depressions in the surface of the tuber.