Effect of acaricides foro the control of brown spider mite on avocado in Chao Valley

Abstract

Several studies have evaluated the efficacy of different acaricides in the control of the brown mite (Oligonychus punicae) in avocado (Persea americana var. 'Hass'). It has been observed that, after 20 days of application, reinfestation of the mite occurs, which underlines the need for constant monitoring for effective control. Abamectin has shown a 99.54% reduction of the Oligonychus yothersi population after 7 days, outperforming other treatments such as Cyhexatin and Chlorfenapyr. Spirodiclofen has shown high efficacy on all stages of the mite, and Maxtrin 0.5 SL has reached an efficiency of 74.8% at 28 days post-application. Acequinocyl and Spiromesifen achieved complete elimination of mites in 3-4 days. Barazide and Ubertop have been identified as highly effective and without phytotoxic effects. In addition, ethoxazole, fenpyroximate and milbemectin have shown an effective residual of 14 to 35 days. Sunflower oil has been noted for its 100% mortality. The aggressiveness of the mite under warm conditions and its short life cycle reinforce the need for the use of acaricides to maintain crop quality. Oligonychus punicae is a key pest in Latin America, significantly affecting avocado productivity.