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According to the investigations of the past few years, a total of 14 kinds of fungal diseases in Guangxi Longan, the pathogens: longan Pan 2 sp Marssonina dimocarpi Q.Wang et CYLai, false tenuis Nimbyasp the., Fine tenuis Alternaria alternata (Fr.) keissler, longan leaves point the mold Phyllostictadimocarpi CYLai et Q.Wang longan at most hair spore bacteria Bartalinia bischofiae Nag Raj, Fusarium oxysporum Fusarium oxysporum Schlecht, sparse hair hair the sp Pestalotiopsispauciseta sacc intends disk multi Paraguay intends to disk the hairy cinerea of ??Pestalotiopsis paraguerienaisis Maubl., longan intends Phoma fungal Phomopsis guiyuan CFZhang et PKChi longan Phomopsis fungal Phomopsis longanae PKChi et ZDJiang longan Diplodia fungus Ascochyta longanC.F.Zhang et PKChi longan The anthracnose pathogen Gloeosporium fructigenum Berk. the longan rubber spore anthrax bacteria Colletotrichum gloeosporioides (Penz.), Sacc. the the longan soot the germs Meliola Capensis (K. \u0026 C.) Theiss.var.Diplogtidis Hansf. Melida nepheliicolaStev.et Rold etc.. Which the Pestalotiopsis pauciseta Sacc. Maubl, Phomopsis guiyuan CFZhang et PKChi the Phomopsis longanae PKChiet ZDjiang of Ascochyta longan with CFZhang et PKChi, Alternaria alternata in Guangxi was first reported, and described Marssonina dimocarpi Q.Wang et CY The Lai and Phyllosticta dimocarpi CYLai et Q.Wang, new species newly recorded species for domestic, Bartalinia bischofiaeNag Raj. The false chain the Alternaria fungus Nimbya sp. Needs to be further identified. The addition of Nimbya sp., Alternaria alternata, Some biological characteristics bischofiae Bartalinia determined. The study showed that Nimbya sp. Alternaria alternata mycelium growth temperature range from 5 to 35 ° C, the optimum was 28 ° C, pH value 4 ~ 11, pH optimum 6 to 7. Both conidia in RH ≥ 75%, 5 to 35 ° C, pH 2 to 11 range could germinate. When the temperature of 28 ° C, pH values ??of 6-7, the spores in the water layer by two hours to germinate, the highest germination rate. But in the tested carbon sources, nitrogen sources, Nimbya SP can use the best carbon source is D-sorbitol, a nitrogen source ammonium nitrate matrix fastest growing colonies on L-histidine sporulation . The Alternaria alternata use the best carbon source is glycerol, nitrogen source is an amino acid. The Bartalinia bischofiae Nag Raj mycelial growth temperature range of 15 ~ 35 ℃, the optimum of 25 to 28 ° C, pH value range from 5 to 11, the optimum pH 7-9, the best use of carbon sources gum arabic powder, soluble starch, D-mannose, and the like. Nitrogen source to nitrate, ammonium nitrogen is appropriate. Conidia required in the water layer to 12 hours to germinate, and 3% glucose solution can promote spore germination. Germination temperature range is 10 ~ 35 ℃, the optimum of 25 to 28 ° C, pH value range is from 3 to 11, optimum pH5 ~~.
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