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Shot hole disease is a major concern of the stone fruit industry. It is estimated that 80% of the California almond crop may be infested with shot hole disease, resulting in a potential yield loss of 50-75%. [3] In the 1930s, it was found that applications of Bordeaux mixture reduces shot hole disease on peaches from 80% to 9%.
In systematic virus infections leaf spots caused by viruses show a loss of green colour in leaves, due to chlorosis which is a repression of chlorophyll development. [1] Leaves may yellow and have a mottled green or yellow appearance, show mosaic (e.g. chlorotic spotting) and ringspots (chlorotic or necrotic rings). [7]
When these pests strike, they often leave small dots or yellow stippling patterns on plant leaves, but they can also cause distorted leaf growth and coat plant leaves and stems with a sticky ...
The signs of the virus begin to become visible when the leaves at the top of the plant begin turning yellow and eventually fall off. [6] This usually occurs in the upper third of the canopy and death of the plant usually occurs soon after the leaves wilt and die. [ 3 ]
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The spots, which may be as much as 12 mm across, are generally circular and have an irregular edge often with a yellow halo. Leaves frequently turn yellow and fall early. Sometimes new leaves are produced, and these may also become affected. Continual defoliation will cause weakness, dieback or death of the plant. Some very susceptible species ...
A common sign of skunks is the presence of 1 to 3-inch cone-shaped holes all over your lawn where skunks have foraged for grubs and worms. They are nocturnal but will occasionally forage in ...