蛀孔、虫粪和内部蛀道提示茎螟危害，但不能据此判断是哪一种。墨西哥稻螟幼虫可在蔗茎内形成被虫粪占据的蛀道。
Boreholes, frass and internal tunnels suggest borer injury. Mexican rice borer larvae can pack sugarcane tunnels with frass. These signs alone do not establish species identity.
中英文字幕 · 每部约2分钟 · 普通话配音 / Mandarin narration。GAKI 会员登录即可观看；下载需要至少1贡献值。 / Sign in to watch; downloads require at least one contribution point.
症状与危害
DAMAGE AND SYMPTOMS
蛀孔、虫粪和内部蛀道提示茎螟危害，但不能据此判断是哪一种。墨西哥稻螟幼虫可在蔗茎内形成被虫粪占据的蛀道。
Boreholes, frass and internal tunnels suggest borer injury. Mexican rice borer larvae can pack sugarcane tunnels with frass. These signs alone do not establish species identity.
来源与传播
ORIGIN AND SPREAD
历史研究记录了它从墨西哥向美国湾岸扩展；文献认为原生范围可能包括墨西哥西部及美国西南部部分地区。甘蔗、水稻、玉米及一些禾草可作寄主，但田边有禾草并不等于已经确认虫源。
Historical research traces expansion from Mexico into the US Gulf Coast. The native range is thought to include western Mexico and parts of the southwestern United States. Cane, rice, maize and some grasses are hosts; nearby grass alone does not establish the source of a field infestation.
生活史与机理
LIFE CYCLE AND BIOLOGY
成蛾产卵；卵常藏于干枯叶片或叶鞘褶隙；孵化幼虫先在绿色组织取食，再入茎，最后在茎内化蛹。各阶段时间受环境影响。
Eggs often occur in dry tissue folds. Larvae feed on green tissue before entering stalks, where they later pupate. Development time varies with conditions.
检查与确认
HOW TO INSPECT AND CONFIRM
采用可重复的巡查路线，记录检查株数和活虫数；展开枯叶褶、剥开部分叶鞘，并对有代表性的样品剖茎。背纹仅用于初筛，最终鉴定依靠专业检查。
Use a repeatable sampling route. Record plants examined and live larvae; inspect dry folds and sheaths, and dissect representative stalk samples. Submit uncertain specimens for identification.
预防、治理与复查
PREVENTION, MANAGEMENT AND FOLLOW-UP
按当地情况选用品种并管理已确认寄主；诱捕用于监测，田间虫情用于决策。任何药剂干预须针对适当阶段，并符合当地登记与技术指导；复查新增受害和活虫，不以旧孔是否消失评价效果。
Use locally suitable cultivars and manage confirmed hosts. Combine trap monitoring with field scouting. If intervention is warranted, target the vulnerable stage under local guidance; assess new injury and live larvae afterwards, not the disappearance of old holes.
观察细节 / Look closely
图片为AI教学重建，非实拍标本或显微照片，不按比例；不能单凭图像确诊。 / AI teaching reconstructions, not authenticated specimens or microscopy; not to scale.
参考资料 / References
- Beuzelin et al. (2016). Biology and Management of the Mexican Rice Borer in Rice in the United States
- Reay-Jones (2005). Integrated pest management of the Mexican rice borer in Louisiana and Texas sugarcane and rice
- Showler (2019). Mexican Rice Borer Control Tactics in United States Sugarcane
- Kang et al. (2022). New Detection of the Invasive Mexican Rice Borer
科普教学资料，专家审核尚未完成。管理措施需结合本地诊断和技术指导。 / Educational material; expert review pending. Use local diagnosis and agronomic advice.