红栀子白纹羽病发生规律及综合防治

Research on the Occurrence regularity and Comprehensive Prevention Remedy of Rosellinia necatrix

通过对红栀子根部病害的调查、室内保湿培养、病原菌分离鉴定,结果表明:引起红栀子黄叶、枯梢甚至于死亡等明显症状的主要病原菌为白纹羽病菌(Rosellinianecatrix褐座坚壳菌)。病害在低洼潮湿或排水不良的高温季节,5-8月蔓延很快,药剂防治试验以40%五氯硝基苯粉剂500倍、25%果病克星乳油800倍防治红栀子白纹羽根部病害90天后相对防治效果分别为77.6%和73.2%。

After we investigated the root disease of red gardenia,nurtured it by keeping wet in room and identifed the germ separation,we can see that the main germ which causes the leaves yellow,the top branches withering even dead is Rosellinia necatrix. The disease spreads quickly during the hot season,that is from May to August,especially if the surrounding is low and badly drained.We can use 40% PCNB powder which is 500 times and 20% GBKX lactic which is 800 times to prevent and remedy the Rosellinia necatrix.After remedying the disease for ninety days,we can get a relative precautionary effect of respectively 77.6% and 73.2%.