银杏叶片早期黄化病主要危害2～3年生移植苗，症状是先端叶片5月下旬至6月上旬呈米黄色，以后逐步往下变黄，无端由黄变白（完全失去叶绿素，有的枝条只长叶柄，叶子退化），最后（7月份）全株叶片黄化，嫩梢枯死，严重者死消长度占菌株高度的1／3～l／2。调查表明银杏早期黄化 Ginkgo biloba early yellow disease mainly harm 2 to 3 years old transplant seedlings, the symptoms are apex leaves late May to early June was beige, and then gradually turn yellow, endless from yellow to white (complete loss of chlorophyll, some branches Only long petioles, leaf degeneration), and finally (July) the whole plant leaves yellow, tender shoots died, serious dead elimination length accounted for 1/3 ~ l / 2 of the strain height. Survey shows that early ginkgo etiolation