紅楓常見的害蟲(chong)(chong)有(you)蛀(zhu)干(gan)害蟲(chong)(chong)的危害。以天牛幼(you)(you)蟲(chong)(chong)為害最多(duo)。6月中下(xia)旬(xun)開(kai)始排(pai)卵，一直(zhi)到10月份停止孵化。天牛多(duo)于夜間在樹(shu)基部(bu)(bu)(bu)近地表處樹(shu)皮裂(lie)縫內排(pai)卵。幼(you)(you)蟲(chong)(chong)以曲線橫向環(huan)蛀(zhu)，然(ran)后向下(xia)蛀(zhu)入(ru)木(mu)質部(bu)(bu)(bu)。粉狀糞便淡黃(huang)色，排(pai)出地面。蛀(zhu)干(gan)害蟲(chong)(chong)多(duo)在樹(shu)干(gan)中部(bu)(bu)(bu)至分支處直(zhi)接蛀(zhu)入(ru)髓部(bu)(bu)(bu)，再向外環(huan)蛀(zhu)至皮層。

防治方法：

六七月孵化(hua)(hua)期，用40％氧(yang)化(hua)(hua)樂(le)果(guo)800倍(bei)(bei)液樹干(gan)噴霧，或用氧(yang)化(hua)(hua)樂(le)果(guo)5倍(bei)(bei)濃液環涂樹基10厘米寬，可(ke)殺死蟲(chong)(chong)(chong)卵。發(fa)現蟲(chong)(chong)(chong)糞堆積可(ke)用鐵丁撥開蛀道，擰死幼蟲(chong)(chong)(chong)。對已進入樹干(gan)的蛀干(gan)害(hai)蟲(chong)(chong)(chong)可(ke)用18％殺蟲(chong)(chong)(chong)雙水劑50倍(bei)(bei)液注射(she)至(zhi)溢出(chu)為(wei)止，能當即殺死幼蟲(chong)(chong)(chong)。