Marangi M, Cafiero M A, Capelli G, Camarda A, Sparagano O A E, Giangaspero A
Dipartimento PrIME and Centro Interdipartimentale Bioagromed, Facoltà di Agraria, Università degli Studi di Foggia, 71100, Foggia, Italy.
Exp Appl Acarol. 2009 Jun;48(1-2):11-8. doi: 10.1007/s10493-008-9224-0. Epub 2008 Dec 17.
Red mite field populations from seven naturally infested Italian caged laying poultry farms were investigated for their susceptibility to acaricide formulations available on the market, containing amitraz, carbaryl and permethrin. A minimum of 3,000 mites of all stages were collected from each farm and were tested with five acaricide concentrations (5, 10, 20, 50, 100%) plus an untreated control (0%). Field red mite populations were found to be tolerant even with the highest concentrations with carbaryl and permethrin for six (86%) and three (42%) of the investigated farms, respectively (P < 0.05). Furthermore, six (86%) of the investigated farms showed a red mite population susceptible to amitraz at any concentration. Out of the seven field populations tested with amitraz, one population is becoming less tolerant whereas another was the most tolerant to carbaryl and permethrin at any concentration. Data show that the lack of effectiveness of some acaricides is spreading in Europe and call for the adoption of alternative management strategies to avoid development of resistance.
对来自意大利7个自然感染的笼养蛋鸡场的红螨田间种群，就其对市场上可买到的含有双甲脒、西维因和氯菊酯的杀螨剂配方的敏感性进行了调查。从每个鸡场收集至少3000只各阶段的螨，并用5种杀螨剂浓度（5%、10%、20%、50%、100%）加一个未处理对照（0%）进行测试。结果发现，在所调查的鸡场中，分别有6个（86%）和3个（42%）的鸡场，其红螨田间种群即使对最高浓度的西维因和氯菊酯也具有耐受性（P<0.05）。此外，在所调查的鸡场中，有6个（86%）的鸡场红螨种群对任何浓度的双甲脒均敏感。在接受双甲脒测试的7个田间种群中，有1个种群的耐受性正在降低，而另一个种群对任何浓度的西维因和氯菊酯耐受性最强。数据表明，某些杀螨剂效力不足的情况正在欧洲蔓延，需要采用替代管理策略以避免抗性的产生。
