梨锈病又称梨赤星病、梨羊胡子,是梨树区普遍发生的一种重要病害,严重年份个别梨园的感病品种病叶率可达60%以上,对果实产量和品质均可产生严重影响。发病原因:引发梨锈病的病原为担子菌亚门真菌梨胶锈菌(图1),其扁烧瓶形的性孢子器埋生于梨叶正面病部组织的表皮下,孔口外露,内生许多无色、单胞纺锤形或椭圆形的性孢子;细圆筒形的锈子器丛生于梨叶病斑 Pear rust, also known as pear brown spot disease, pear and beard, pear is a common disease in pear district, severe pear disease susceptible varieties in individual years the disease rate of more than 60% of leaf disease on the yield and quality of fruit can have serious influences. The cause of the disease: the pathogen causing pear rust is the basidiomycetes subtilis fungi Phyllanthus emblica (Figure 1), its flat flask-shaped sporulation device was born in the front of the diseased pear tissue under the epidermis, the orifice exposed, endogenous Many colorless, spindled or oval spores; fine cylindrical rust arborism in pear leaf spot