Unidad de Entomología, Centro de Protección Vegetal y Biotecnología, Instituto Valenciano de Investigaciones Agrarias, Apartado Oficial, Carretera de Moncada a Náquera, 46113 Moncada, Valencia, Spain.
Exp Appl Acarol. 2010 Apr;50(4):317-28. doi: 10.1007/s10493-009-9318-3. Epub 2009 Sep 26.
Tetranychus urticae is one of the most damaging tetranychid mites affecting clementine orchards in Spain, where natural control is insufficient. Furthermore, in clementine nurseries, tender foliage is highly susceptible to attack and natural enemies are almost always absent. Therefore, acaricides are often used indiscriminately. Alternative control measures are necessary, both in commercial orchards and clementine nurseries. In order to assess the efficacy of inoculative releases of N. californicus and P. persimilis to reduce T. urticae populations in young Spanish clementine plants, a semi-field experiment was conducted and repeated in three seasons (spring, summer and autumn). Phytoseiulus persimilis was highly effective in reducing both T. urticae infestations and the damage level inflicted on plants at both release rates evaluated (40 and 80 phytoseiids/plant) and all three periods considered. By contrast, N. californicus demonstrated low performance under certain conditions. The results of this study could be adapted and transferred to nurseries and young citrus plantations.
橘全爪螨是为害西班牙甜橙园的重要害螨之一，其自然控制作用不足。此外，在甜橙苗圃中，嫩枝叶极易受到攻击，且几乎没有天敌。因此，经常会不加选择地使用杀螨剂。无论是在商业果园还是甜橙苗圃，都需要采取替代控制措施。为了评估加州新小绥螨和智利小植绥螨的释放对降低西班牙年轻甜橙植株上橘全爪螨种群的效果，进行了半田间试验，并在三个季节（春季、夏季和秋季）中重复进行。植绥螨在降低橘全爪螨的种群数量和对植物造成的伤害水平方面非常有效，在评估的两种释放率（40 和 80 头/株）和考虑的三个时期都是如此。相比之下，加州新小绥螨在某些条件下表现不佳。本研究的结果可以适应并转移到苗圃和年轻柑橘种植园中。
