Behaviour of alatae ofMyzus persicae(Sulzer) (Hemiptera: Aphididae) on chemically treated surfaces after tethered flight

Abstract

Alatae of Myzus persicae (Sulz.) were made to fly and then released directly onto untreated or chemically treated surfaces where settling behaviour was studied. Most aphids probed host-leaf surfaces even in the presence of vapour of (E)-j8-farnesene, the main component of aphid alarm pheromone, or when related behaviour-controlling chemicals were painted on the leaf. Flown aphids attempted to probe most surfaces on which they landed, including glass and green paper. However, they did not probe white filter papers. Sublethal deposits of deltamethrin did not prevent initial probing on plant surfaces but caused uncoordinated leg movements which resulted in aphids falling from the plants.

Responses of Myzus persicae to the repellent polygodial in choice and no‐choice video assays with young and mature leaf tissue

“…Despite such clear demonstrations of repellency, when whole mature leaves (Griffiths et al, 1982) or seedlings Powell et al, 1993) were treated with polygodial, allowing no choice of a less deterrent substrate, aphids showed no differences in behaviour from those on control plants. No direct comparisons have been made of aphid responses to polygodial applied in choice and no-choice tests, with other experimental conditions held constant; such an approach may help interpret previous findings and contribute to a better understanding of the repellent effect.…”

Respostas comportamentais da cigarrinha-do-milho, >i<Dalbulus maidis>/i< (Hemiptera: Cicadellidae), a plantas infectadas pelo fitoplasma do milho

“…Em Homalodica coagulata Say (Hemiptera: Cicadellidae), a coloração aumentou o tempo de 'labial dabbing' enquanto a presença de voláteis da planta hospedeira estimulou o início do comportamento alimentar (Patt & Sétamou, 2014). Apesar das pistas presentes sobre a superfície foliar serem avaliadas pelos insetos e estimularem o comportamento alimentar, esse comportamento parece ser desencadeado pelo contato dos tarsos com qualquer superfície sólida mesmo sob a presença de voláteis repelentes (Griffiths et al 1982;Phelan & Miller, 1982;Powell et al 1999).…”