The frequent use of acaricides against the tick Rhipicephalus microplus increases the risk of development of resistance. Recent studies have revealed that Neoglaziovia variegata, an indigenous plant species known in Brazil as ‘caroá’, has a deleterious effect against R. microplus. In the current study, extracts of N. variegata were studied for their possible acaricidal properties. A hexane extract of N. variegata leaves was fractionated in a chromatography column and the fractions were tested in adult tick immersion tests in triplicate using three concentrations (5, 10 and 25 mg/ml). All the fractions had harmful effects on the ticks. However, three fractions were more efficaceous. Phytochemical analysis indicated that stigmast-5-en-3-ol and stigmastanol were most abundant; they might be responsible for the acaricidal effects, making them potentially useful as alternative agents to control the tick R. microplus.

经常使用杀螨剂对抗微小的Rhipicephalus microplus会增加产生抗药性的风险。最近的研究表明，巴西新近生杂草（Neoglaziovia variegata）是一种对R. microplus具有有害作用的本土植物，在巴西被称为“caroá” 。在当前的研究中，研究了杂色猪笼草的提取物的可能的杀螨特性。杂色猪笼草的己烷提取物将叶片在色谱柱中分级，并使用三种浓度（5、10和25 mg / ml）一式三份，在成人壁虱浸没试验中测试级分。所有的馏分都对the虫有有害作用。然而，三个部分更有效。植物化学分析表明，stigmast-5-en-3-ol和stigmastanol含量最高。它们可能是杀螨作用的原因，使其有可能用作控制壁虱R. microplus的替代药物。