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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dead areas on leaves usually along leaf margins and veins
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localized areas of dead bark and underlying wood on twigs, branches, and trunks
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root tips that are brown and dead
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a dry, powdery, reddish-orange substance on leaves
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Detailed explanation-1: -Anthracnose is the most serious disease of sycamore. The first symptoms appear in early spring as the leaves begin to unfurl from the leaf buds, and at this stage the disease may be mistaken for frost damage. Infected leaves that do not drop will develop light brown dead areas, usually along the veins.
Detailed explanation-2: -Black spots begin to develop on the surface of the plant, and grows radially outward: the manifestation of anthracnose disease. These are the first visual symptoms of an infected plant, and usually occur along leaf veins on the underside of the leaf.
Detailed explanation-3: -Mango anthracnose symptoms on fruits Irregular, dark brown to black lesions form anywhere on the fruit and often coalesce to form larger, severely blighted areas. Lesions are somewhat depressed or sunken; they are initially superficial but can penetrate deep into the flesh as disease progresses.