HORTICULTURE SCIENCE
PLANT DISEASES PATHOGENS THEIR SURVIVAL AND SPREAD
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They reduce the area for photosynthesis.
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They destroy cells.
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They act as a vector, transferring viruses, bacteria and fungi between the plants.
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They prevent plants from acquiring the water and minerals it needs.
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Detailed explanation-1: -Nematodes can damage these important food crops along with many others. Nematodes possess a straw-like mouth part that injects a mixture of enzymes into the plant, which breaks down the plant cells into a plant-cell soup. After the cells are broken down, the nematodes eat up this soup [2].
Detailed explanation-2: -Symptoms of nematode damage on corn include stunting and/or yellowing of foliage and stunting, swelling, and/or browning of roots.
Detailed explanation-3: -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).