Root-knot nematodes (RKNs) are significant pests of sweetpotato causing symptoms of infection which include: stunted plant growth, yellowing of leaves, abnormal flower production, and gall production on roots leading to decreased nutrient and water absorption and necrosis and cracking on fleshy storage roots. 16 авг. 2017 г.
How do nematodes cause harm to humans describe?
Intestinal nematodes can cause some GI problems (eg, abdominal pain, diarrhea, anorexia, weight loss, malaise). Hookworms can cause serious anemia. Onchocerciasis can result in blindness (river blindness). Trichinosis can cause life-threatening manifestations, including myocarditis, CNS involvement, and pneumonitis.
How are nematodes harmful to plants?
These nematodes also damage feeder roots and root hairs, further reducing a plant's effective extraction of water and nutrients from the soil. The overall effect is a weak, shallow root system with many dead or dying areas.
How do nematodes infect humans?
Humans usually acquire the infection by ingesting these eggs via contaminated food or water; eggs then hatch in the small intestine and release larvae that penetrate the intestine and migrate to the lungs a few days later.
How does nematode damage nematode in plants?
Many plant-parasitic nematodes feed on the roots of plants. The feeding process damages the plant's root system and reduces the plant's ability to absorb water and nutrients. Typical nematode damage symptoms are a reduction of root mass, a distortion of root structure and/or enlargement of the roots (Figure 6, 7, 8).
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How are nematodes harmful to humans?How do nematodes cause harm to plants?
