Mirza Jawwad Hassan, Kamran Muhammad, Alatawi Fahad Jaber
Acarology Laboratory, Department of Plant Protection, College of Food and Agriculture Sciences, King Saud University, Riyadh, 11451, Saudi Arabia.
Chair of Date Palm Research, Department of Plant Protection, College of Food and Agriculture Sciences, King Saud University, Riyadh, Saudi Arabia.
Exp Appl Acarol. 2018 Oct;76(2):197-207. doi: 10.1007/s10493-018-0297-0. Epub 2018 Sep 24.
The present study examined the webbing life type and behavioral response of date palm mite (DPM) Oligonychus afrasiaticus (McGregor) toward its webbing residues, in presence or absence of immature individuals, on leaves and fruits of date palm. DPM exhibited a complicated web life type on both the leaves and fruits of date palm, which is characterized by the following features: complicated irregular web structure; webbing density on the leaves is medium and on the fruits extremely high; eggs are always laid on the threads of web without web cover; fecal pellets are deposited on the substrate surface (both leaf and fruit); quiescent stages are on the silken web threads; and the preferred site for feeding and walking is under the web. Behavioral observation of DPM females revealed that the midrib of leaves and the base of fruits of date palm were the preferred sites for feeding and web construction. The number and development stage of DPM affected the behavioral response of females on date palm leaves but not on the fruits. DPM spent most time feeding under the web on both the leaves and fruits of date palm.
本研究调查了枣椰树螨（DPM）非洲小爪螨（Oligonychus afrasiaticus）（麦格雷戈）在枣椰树叶片和果实上，在有或没有未成熟个体的情况下，对其织网残留物的织网生活类型和行为反应。枣椰树螨在枣椰树的叶片和果实上均呈现出复杂的织网生活类型，其特征如下：织网结构复杂且不规则；叶片上的织网密度中等，果实上的织网密度极高；卵总是产在没有网覆盖的网丝上；粪便颗粒沉积在基质表面（叶片和果实）；静止阶段在丝质网丝上；取食和行走的首选部位在网下。对枣椰树螨雌螨的行为观察表明，枣椰树叶片的中脉和果实基部是取食和织网的首选部位。枣椰树螨的数量和发育阶段影响雌螨在枣椰树叶片上的行为反应，但对果实上的行为反应没有影响。枣椰树螨在枣椰树叶片和果实的网下取食的时间最长。
