今天一早发现我家的茶花凤仙的叶子有一点一点的黑斑,看起来有点焦,还落了些叶子,不知是虫害还是病毒,有什么防治方法吗?<img src="attachments/dvbbs/2004122130966498.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2004122130966498.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />