The abundance of Panonychus citri McGregor 1916 (Acari: Tetranychidae) and its associated enemies (Euseius stipulatus Athias-Henriot, 1960; Typhlodromus sp.; Phytoseiulus persimilis Athias-Henriot, 1957) was studied on two 12-year-old citrus cultivars, specifically Clementine “Nules” (Citrus Clementina) and Valencia (Citrus sinensis), in the Gharb region of Morocco. Throughout the entire monitoring period in the Valencia late cultivar, the density of the spider mite P. citri on leaves was notably higher at 38.0% (n = 1,212 mobile forms). Predator P. persimilis exhibited a leaf occupancy of 25.0% (n = 812), followed by Typhlodromus sp. at 20.0% (n = 643). Conversely, the abundance of E. stipulatus was lower at 17.0% (n = 538). In the Nules variety, P. citri abundance recorded a higher percentage at 48.0% (n = 1,922). E. stipulatus emerged as the most abundant predator at 23.0% (n = 898), followed by P. persimilis with 16.0% (n = 639). Meanwhile, the population of Typlodromus sp. remained notably low at 13.0% (n = 498). Regarding the fluctuation of the different mites studied on the two cultivars across monitoring dates, the period from May 4 to June 1 was characterized by low temperatures and a diminished presence of mite populations (P. citri, E. stipulatus, Typhlodromus sp., and P. persimilis). However, from June 7 to June 19, characterized by high temperatures, a notable increase in the presence of mite populations was observed. As regards the effect of the variety on the different mites studied, the varietal impact was significant.

中文翻译：

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两种柑橘植物对柑橘全爪螨（蜱螨亚科：叶螨科）和有益植绥螨变异的影响评估

丰富程度柑橘全爪螨McGregor 1916（螨虫：叶螨科）及其相关天敌（尤西乌斯阿蒂亚斯·亨利，1960；伤寒鼠;浅植绥螨Athias-Henriot，1957）对两个 12 年树龄的柑橘品种进行了研究，特别是克莱门汀“Nules”（柑橘克莱门蒂娜）和巴伦西亚（柑橘），位于摩洛哥加尔布地区。在瓦伦西亚晚熟品种的整个监测期间，红蜘蛛的密度柑橘假单胞菌叶子上的比率明显更高，达到 38.0%（n= 1,212 个移动表单）。掠夺者拟青霉表现出25.0％的叶子占有率（n= 812），然后是伤寒鼠sp。 20.0%（n= 643）。相反，丰富的细纹桉较低为 17.0% (n= 538）。在 Nules 品种中，柑橘假单胞菌丰度记录的百分比较高，达到 48.0%（n= 1,922）。细纹桉成为数量最多的捕食者，占 23.0%（n= 898），然后是拟青霉16.0%（n= 639）。与此同时，人口斑足虫sp。仍显着保持在 13.0% 的低位（n= 498）。关于两个品种在不同监测日期内研究的不同螨虫的波动情况，5 月 4 日至 6 月 1 日期间的特点是气温较低，螨虫数量减少（柑橘 P. citri、E. sproveus、Typhlodromussp.，和拟青霉）。然而，从6月7日到6月19日，由于气温较高，螨虫数量显着增加。至于品种对所研究的不同螨虫的影响，品种影响是显着的。