论文部分内容阅读
近期笔者到茭白产区调查发现,有部分产区的茭白锈病发生较重,已对茭白产量和品质造成危害,严重的甚至绝收,茭农必须引起重视,及时做好锈病防治工作。1.锈病的发生与症状茭白锈病主要危害叶片及叶鞘。一般茭白锈病的病菌以菌丝体在老株上或以冬孢子堆在病残体上越冬。次年菌丝长出夏孢子通过气流传播,在适宜的温湿度条件下长出芽管,从叶片的气孔侵入。发病初期叶反面呈褪绿小点,后稍大,呈黄褐色隆起的小疱斑,病斑散生或排列成行,之后叶鞘和茎上也出现病斑,严重时全
Recently, the author of the survey found that there were some white rust occurrences in some producing areas, which have caused serious harm to the yield and quality of the scallop. Severe or even unacceptable harvests should be paid to farmers. 1. The occurrence and symptoms of rust 茭 White rust mainly leaves and leaf sheaths. General 茭 white rust disease to mycelium in the old strain or winter spores on the sick residual body winter. The next year mycelium grows by the summer spore air spreader, grows in the appropriate temperature and humidity conditions bud tube, stomatal invasion from the leaves. In the early onset of the leaves, the surface of the leaves showed a chlorotic small dot, slightly larger, yellowish brown bulge spots, spots scattered or arranged in rows, followed by lesions on the leaf sheath and stem, serious