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我园 1997年垦地建园 ,荒坡地 ,坡度较大 ,平均海拔高度 160 0ｍ左右 ,ｐＨ值 7 9～ 8 3。 2 0 0 0年 6月中旬 ,石榴树成片出现叶片黄蔫 ,失绿 ,部分枯死 ,平坦台地较山坡地严重。经送四川省农业科学院植物保护研究所鉴定 ,确认为石榴白绢病。1 症状 首先叶片变黄 ,新梢生长?
I park in 1997 Kenji built Park, wasteland, slope larger, with an average altitude of about 160 0m, pH value of 7 9 ~ 8 3. In mid-June 2000, pomegranate tree into a film leaves Huangpi, green, some dead, flat terrain more serious than the hillside. After being sent to Institute of Plant Protection of Sichuan Academy of Agricultural Sciences identified as pomegranate venereal disease. 1 Symptoms first leaf yellowing, shoot growth?