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Symptoms include poor plant growth, and leaves become pale green or yellow because they are unable to make sufficient chlorophyll. Leaves in this state are said to be chlorotic . Lower leaves (older leaves) show symptoms first, since the plant will move nitrogen from older tissues to more important younger ones. [ 7 ]
The damage to the plant is relatively localized, although diseased corn plants are more susceptible to stalk rot than are healthy plants. [2] In conditions with high humidity, the fungus will produce new spores at the leaf surface, which are spread by rain or wind through the crop and create cycles of secondary infection. [ 5 ]
Corn grey leaf spot can be an extremely devastating disease as potential yield losses range from 5 to 40 US bushels per acre (440 to 3,480 L/ha). At higher disease levels, even greater losses can result. When a corn plant's ability to store and produce carbohydrates (glucose) in the grain is diminished, yield losses take place.
Protect the ears from corn earworms by putting several (4 or 5) drops of mineral oil at the tips of each ear as the silks begin to turn brown and dry. That’s an old but effective way of keeping ...
Corn will respond to a side-dressing of a nitrogen-rich source of fertilizer when plants are approximately 12 inches tall. Apply 8 ounces of 10-10-10 fertilizer to every 10 linear feet of row.
While the plants are weak and vulnerable, stalk rot fungi can further invade the corn plant. [9] The degree of multiplication of the bacteria is highly dependent on susceptibility of the cultivar. In most cases, the wilt phase occurs on seedlings, but for certain corn types (i.e. sweet corn), more mature plants can wilt.
Young leaves, may experience chlorotic spotting which may eventually turn into a mosaic or mottle pattern (“Maize Dwarf Mosaic Virus,” n.d.). Later in the growing season, the mosaic pattern may bleed into a general yellowing of the leaf and eventually areas of red streaks or blotches may appear if night time temperatures are consistently ...
They have cytoplasmic resistance to the T-toxin of Bipolaris maydis (produced by Race T). The absence of a gene found only in plants with Texas male sterile cytoplasm is the reason for this resistance. [1] Corn plants with T-cms cytoplasm have maternally inherited the gene T-urf 13, which encodes for a protein component of the inner ...