fengxianhuadehuaxingxiaoqiaolinglong,huasejiaoqiaoyanli,erqieqihuatou、chi、wei、zujuqiaoranrufengzhuang,guyoumingjinfenghua。fengxianhuadeshengmingliwangsheng,shiyingxingqiang,danfengxianhuachangshoudaobaifenbing、hebanbing、likubingzheisanzhongbinghaideweixie,xiamianweinijieshaofengxianhuazheisanzhongchangjianbinghaidefangzhifangfa。
凤仙花白粉病:凤仙花的白粉病主要发生在叶片和嫩梢上。一般在6月开始发生,7月份以后叶面布满白色粉层。随后,在白粉层中形成黄色小粒点,颜色逐渐变深,最后呈黑褐色。
防治方法:
1、yaofangzhifengxianhuadebaifenbing,zhuyaoyaojiaqiangtongfeng,zaizhishi,zhuyikongzhizhizhudemidu,jiaqiangfeishuiguanli,zengqiangzhizhudekangbingli。
2、baifenbingdebingjunzaibingzhucantihezhongzineiyuedong,yinian,huanjingshiyishi,bingjunkejiefengyuchuanbo。suoyiyaojiangbingye、bingzhuqingchu,jizhongxiaohui,jianshaochuanranyuan。
3、8~9月为本病的盛发期,在发病期间用15%粉锈宁可湿性粉剂1000~1200倍液,或70%甲基托布津可湿性粉剂1000倍液防治。在32℃以上的高温下避免喷药,以免发生药害。
fengxianhuahebanbing:fengxianhuahebanbingyouchengfengxianhuayebanbing,binghaizhuyaofashengzaiyepianshang。yemianbingbanchuweiqianhuanghesexiaodian,houkuozhanchengyuanxinghuotuoyuanxing,yihouzhongyangbianchengdanhese,bianyuanhese,juyoubumingxiandelunwen。yanzhonghuanbingdeyepianshang,bingbanlianpian,daozhiyepianbiandekuhuang,zhizhizhizhusiwang。
防治方法:
1、fengxianhuaxifeiwodeshazhirangtu,bunailao。yinci,zhongzhiyishazhirangtuweiyi,yilipaishui。
2、penzaifengxianhua,yuhouyingjishidaopen。qiumoyingjiangbingye、bingzhujizhongxiaohui,jianshaolainianchuanranyuan。
3、发病初期用25%多菌灵可湿性粉剂300~600倍液,或50%甲基托布津100倍液,或75%百菌清1000倍液防治。
fengxianhualikubing:fengxianhuadelikubingzhuyaoweihaideshigenjingbu,bingjunqinrangenjingbu,zhibingbubianheihuoyisuo,chaoshishiqishangshengbaisemeizhuangwu,zhizhuranbinghou,shutianneijijianyeweinian、ganku,jierzaochengzhengzhusiwang。
防治方法:
在发病初期拔除病株后喷洒75%百菌清可湿性粉剂600倍液,或60%多·福可湿性粉剂500倍液、20%甲基立枯磷乳油1200倍液。