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芦笋茎枯病是上海郊区芦笋生产上的主要病害,主要为害芦笋的茎枝,不仅影响翌年的嫩茎产量和降低品质,且易造成早衰、缺株,甚至绝产毁种。往年一般病茎率在50%以上,重病笋田产量损失70%。近年,茎枯病危害日益严重,1985年大流行,据10月中、下旬调查,发病率达74.29～100%,病情指数达43.40～98.85,直接影响到芦笋稳产高产和笋田种植面积的扩大。一、病害症状茎杆受害发病初期呈梭形或成短线形、灰褐色水渍状病斑,边缘不明显,病斑容易扩大,呈纵长纺锤形、数厘米的病斑,病斑相互愈合后可呈连片状,中心部位稍凹陷呈赤褐色,似有同心圈状轮纹,
Asparagus stem blight is the main disease in the production of asparagus in the suburbs of Shanghai. It mainly affects the stems and shoots of asparagus, which not only affects the yield and quality of tender stems of the next year but also easily causes premature aging, lack of strains and even destructive abortion. In previous years the general incidence of sick stems in more than 50%, severe disease shoots field output loss of 70%. In recent years, the risk of stem blight growing increasingly serious, the 1985 pandemic, according to mid-and late October survey, the incidence of 74.29 to 100%, the disease index of 43.40 to 98.85, a direct impact on high-yielding asparagus and bamboo shoots to expand the area planted . First, the disease symptoms Early onset of the spindle was spindle or into a short line shape, brown water stain-like lesions, the edge is not obvious, the lesion is easy to expand, was vertical spindle-shaped, a few centimeters of spots, lesion healing After a contiguous flake, the central part of the depression was auburn brown, it seems concentric rings pattern,