萬年青生長期間易受葉斑病、炭疽病
、介殼蟲、褐軟蚧等危害。
　　
　　(1)葉ye斑ban病bing。此ci病bing發fa生sheng在zai萬wan年nian青qing的de葉ye片pian上shang，濕shi度du大da的de天tian氣qi，此ci病bing易yi於yu發fa生sheng。病bing斑ban起qi初chu為wei褐he色se小xiao斑ban
，周zhou邊bian呈cheng水shui浸jin狀zhuang褪tui綠lv色se，並bing呈cheng輪lun紋wen狀zhuang擴kuo展zhan
，圓yuan形xing至zhi橢tuo圓yuan形xing，邊bian緣yuan褐he色se內nei灰hui白bai色se。後hou期qi病bing斑ban中zhong心xin出chu現xian黑hei褐he色se黴mei斑ban
，潮chao濕shi條tiao件jian下xia變bian成cheng黑hei褐he色se黴mei層ceng。防fang治zhi此ci病bing的de方fang法fa是shi及ji時shi清qing除chu病bing殘can葉ye片pian；發病初期或後期均可用0.5%～1%的波爾多液(或50%多菌靈1000倍液)噴灑。
　　
　　(2)tanjubing。cibingyefashengzaiwannianqingdeyepianshang，yanzhongshikemanyanzhiyebingshang。bingbanchuqichengshuijinzhuangxiaohuangban，kuozhanhoushituoyuanxingzhibuguizezhuangdehesehuohuanghese，shaoxianlunwenzhuang
，houqibingbanlianchengyipianchenggankuzhuang，bingchanshenglunwenpailiedexiaoheidian。zhezhongbingzhuyaoshitongfengbuhao
，youjiekechongweihaishiyoulibinghaidefasheng。fangzhicibingdefangfashijiaqiangyanghu、增施磷、鉀肥；發病初期可用0.3%～0.5%等量式波爾多液(或60%代森鋅800～900倍液，或70%托布津1500倍液)噴灑。
　　
　　(3)褐he軟ruan蚧jie。軟ruan蚧jie危wei害hai植zhi物wu時shi，一yi般ban群qun集ji在zai葉ye麵mian或huo嫩nen葉ye上shang
，刺ci吸xi植zhi株zhu液ye汁zhi，同tong時shi排pai泄xie粘zhan液ye，其qi排pai泄xie物wu易yi引yin起qi煤mei汙wu病bing菌jun大da量liang繁fan殖zhi
，使shi莖jing葉ye變bian黑hei，影ying響xiang植zhi株zhu的de光guang合he作zuo用yong
，造zao成cheng生sheng長chang勢shi弱ruo，葉ye片pian枯ku黃huang，有you礙ai觀guan賞shang。發fa生sheng嚴yan重zhong時shi，枝zhi莖jing上shang布bu滿man蟲chong體ti，造zao成cheng植zhi株zhu枯ku黃huang，影ying響xiang生sheng長chang。防fang治zhi方fang法fa：如果被害植株少
，或蟲數不多，一般用竹片等物將蟲體刮除即可。