How is wheat downy mildew transmitted?
How is wheat downy mildew transmitted? Wheat downy mildew is a fungal disease. The pathogen oversummered in the host diseased tissue with oospores. The oospores germinate and produce sporangia when the conditions are suitable. Oospores and sporangia spread by running water, germinate and produce zoospores, which invade from coleoptile to hyphae, and hyphae go deep into the growth point of host young bacteria for systematic infection. The autumn seedling stage of wheat is the main infection time of the pathogen, and stagnant water in the field or improper irrigation are beneficial to the disease.
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Wheat stripe rust can be treated in different areas.
Wheat stripe rust is a serious biological disaster that affects the safe production of wheat in China for a long time. In general epidemic years, the yield of wheat is reduced by 10% by 20%. In extremely epidemic years, the yield can be reduced by more than 60%, and even there is almost no harvest of wheat. According to the comprehensive analysis of the number of bacterial sources, weather conditions and variety distribution, the year 2011 is predicted.
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Wheat thicket dwarf disease
Wheat rosette dwarf disease is a viral disease transmitted by the virus vector gray planthopper. There are two peaks in the transmission and infection of gray planthopper on wheat: the first peak is after the emergence of wheat seedlings, and the second peak is after the wheat turns green.
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