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Pycnidia can be found in the center of the said lesions. Pycnidia are fruiting bodies of the fungus. When the lesions become numerous often the leaves turn yellow, then brown, shriveling up and eventually dropping off the plant altogether. [1] Tomato leaf with septoria leaf spot symptoms of dark spots and yellow surrounding region
Pydiflumetofen has fungicidal effects against a wide range of crop pests. These include Alternaria, grey mould (Botrytis cinerea), Cercospora (leaf spot), septoria, powdery mildews (e.g. Uncinula necator), and scab (e.g. Venturia pyrina). As a result, it has potential use in crops including cereals, corn, soybeans, vegetables, peanut, curcubits ...
Septoria leaf spot infects the blueberry plant through spores ejected from infected leaves and stem lesions left on the ground from the previous harvest season. These spores infect the crop and small white/tan leaf lesions form on the plant and the stem in early May. These lesions continue to develop and multiply through September. [62]
Septoria are ascomycete pycnidia-producing fungi that cause numerous leaf spot diseases on field crops, forages and many vegetables including tomatoes which are known to contract Septoria musiva from nearby cottonwood trees, and is responsible for yield losses.
Management of Septoria leaf spot of potato is important because once introduced into a new area due to its soil borne and long lasting nature it is impossible to eradicate. Today, Septoria malagutii and other septoria disease are controlled with a number of different methods including the use of fungicides and cultural controls.
Severe attacks of Septoria secalis can result in crop yield losses between 10% and 40%. [2] Common control measures include crop rotation, the ploughing of plant debris, and fungicidal treatment of affected plants. Yan & Hunt 2001 finds that in most years SLB is the primary yield loss factor in Ontario, Canada. [3]