β-Damascone appeared a weak attractant close to not active to Myzus persicae, but modifications of its structure caused the avoidance of treated leaves by aphids during settling and reluctance to probe in simple choice- and no-choice experiments in previous studies. Here, the electrical penetration graph (EPG) technique, which allows monitoring of aphid probing within plant tissues, was applied to explore the biological background and localisation in plant tissues of the deterrent activities of β-damascone and its analogues. Activity of β-damascone and β-damascone-derived compounds depended on their substituents, which was manifested in the variation in the potency of the behavioural effect and differences in aphid probing phases that were affected. β-Damascone appeared a behaviourally inactive compound. The moderately active β-damascone ester affected aphid activities only during the phloem phase. The highly active deterrents—dihydro-β-damascol, β-damascone acetate, δ-bromo-γ-lactone, and unsaturated γ-lactone—affected pre-phloem and phloem aphid probing activities. The most effective structural modification that evoked the strongest negative response from M. persicae was the transformation of β-damascone into δ-bromo-γ-lactone. The behavioural effect of this transformation was demonstrated in frequent interruption of probing in peripheral tissues, which caused repeated failures in finding sieve elements, and reduction in the ingestion time during the phloem phase in favour of watery salivation. The inhibition of aphid probing at both the pre-phloem and phloem levels reveals the passage of the compounds studied through the plant surface and their distribution within plant tissues in a systemic way, which may reduce the risk of the transmission of non-persistent and persistent viruses.

中文翻译：

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新型β-大马士革类似物对蚜虫探测和取食的系统威慑作用。

β- Damascone似乎是弱的引诱剂，几乎对桃蚜无活性，但是其结构的改变导致在定居过程中蚜虫避开了经过处理的叶子，并且不愿在先前的研究中进行简单的选择和无选择实验。在这里，电渗透图（EPG）技术可以监测植物组织内的蚜虫探测，并被用于研究β-大马酮及其类似物的威慑活性的生物学背景和在植物组织中的定位。β-金刚烷酮和β的活性-大马康酮衍生的化合物取决于其取代基，这表现为行为效应效力的变化和受影响的蚜虫探测相的差异。β- Damascone出现了无行为活性的化合物。中等活性的β-金刚烷酸酯仅在韧皮部阶段才影响蚜虫的活动。高活性威慑剂-二氢-β-达马可酚，β-达马可可乙酸酯，δ-溴-γ-内酯和不饱和γ-内酯会影响韧皮部和韧皮部蚜虫的探测活性。最有效的结构修饰引起了桃蚜的最强烈的负面反应是β-达马可酮向δ-溴-γ-内酯的转化。这种转化的行为效应在周围组织的频繁探测中断中得到了证明，这导致寻找筛分元素的反复失败，并在韧皮部阶段减少了摄入时间，有利于流涎。在前韧皮部和韧皮部水平上对蚜虫探测的抑制揭示了所研究的化合物通过植物表面的通道及其在植物组织中的分布，从而系统地减少了持久性和持久性传播的风险。病毒。