Yan Xiang Shi

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Leaf mustard (Brassica juncea) is a common vegetable widely distributed in China. From September to December, 2014, grey mould disease on leaf mustard was discovered and spread quickly with a high incidence of 35–70 % in Shunyi District, Beijing, China. The pathogen was identified based on detailed morphological, cultural characteristics and pathogenicity(More)
The experiments show that polar mesosphere summer echoes (PMSE) and polar mesospheric winter echo (PMWE) are both related to the existence of dust particles. For the sake of finding the appropriate theory of the abnormally phenomenon taking placed in the mesosphere atmosphere, it is all-important to study the conductivity and permittivity of dust plasma(More)
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