Litchi growers reported the infestation of an unknown insect pest recently in the north-eastern part of Bangladesh, which affected litchi production remarkably. A field survey was conducted to identify this invasive insect species, and the biology of this insect was studied under laboratory conditions. Further, damage severity of the insect was determined in the affected litchi orchards. Based on morphological features, the invasive species was identified as litchi stink bug, Tessaratoma javanica (Thunberg) (Hemiptera: Tessaratomidae). Female stink bugs laid eggs in clusters (2.0) either upper or lower surface of both mature and young litchi leaves. After egg hatching, nymphs completed five distinct instars before reaching to adults. Longevity of adult litchi stink bug varied on sex types, while females lived longer than males. The level of litchi stink bug infestation varied greatly in the survey areas. The infestation of stink bug did not find in all inflorescence of the attacked plants. Significantly decreased fruits were recorded in the infested inflorescence. This study firstly confirm the invasion of litchi stink bug in Bangladesh, and this information would help scientist to develop IPM strategies against this destructive stink bug species using available resources.

中文翻译：

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孟加拉国首次报告荔枝臭虫（Tessaratoma javanica Thunberg）暴发

近期，荔枝种植户报告称，孟加拉国东北部发生了一种未知害虫，严重影响了荔枝生产。进行了实地调查以识别这种入侵昆虫物种，并在实验室条件下研究了这种昆虫的生物学。此外，在受影响的荔枝园中确定了昆虫的损害严重程度。根据形态特征，入侵物种被确定为荔枝臭虫 Tessaratoma javanica (Thunberg) (Hemiptera: Tessaratomidae)。雌性臭虫在成熟和年轻荔枝叶的上表面或下表面成簇（2.0）产卵。卵孵化后，若虫在到达成虫之前完成了五个不同的龄期。成年荔枝臭虫的寿命因性别而异，而雌性比雄性长寿。各调查区荔枝臭虫侵染程度差异较大。受害植物的所有花序中均未发现臭虫侵染。在受侵染的花序中记录到显着减少的果实。这项研究首先证实了荔枝臭虫在孟加拉国的入侵，这一信息将有助于科学家利用现有资源制定针对这种破坏性臭虫物种的 IPM 策略。