黄瓜产生苦味瓜，主要是由于苦味素在黄瓜中积累过多所致。发病高峰期一般主要集中在初花期的根瓜及盛花后期衰老植株上所结的瓜，一般棚（室）发病率05％一豆％，严重的可达5％一10％。据调查，棚（室）黄瓜产生苦味瓜的原因，一是品种造成的，如密刺系统的长春密刺、山?.. Cucumber produce bitter melon, mainly due to the accumulation of bitter bitter cucumber too much. The peak incidence generally concentrated in the early flowering of the root melon and flowering late senescent plants on the melon, the general shed (room) incidence of a bean% 05%, a serious up to 5% to 10%. According to the survey, shed (room) cucumber produce bitter taste of melons, one is caused by varieties, such as the spike system of Changchun sting, mountain?