The present study was conducted to determine the role of guava fruit volatiles in attraction, oviposition and associated fitness parameters of the peach fruit fly, Bactrocera zonata Saunders, which is a key pest of guava and many other fruits. B. zonata female flies’ attraction was observed in a Y-tube olfactometer using fruits of three locally grown guava varieties; Gola, Larkana Small Surahi (LSS) and Larkana Large Surahi (LLS). Female flies showed significantly higher levels of attraction to both un-infested and infested guava fruit odors compared to control (blank). In pairwise comparisons between different fruit varieties, females B. zonata showed significantly greater levels of attraction towards un-infested Gola compared to un-infested LSS, while in the case of the same variety, significantly higher number of flies were attracted to un-infested compared to infested fruit in all three tested varieties. In two-choice oviposition bioassays, B. zonata females made significantly more visits, greater numbers of ovipositions, spent a significantly longer time, and larger numbers of pupae and adults developed on Gola fruits compared to LSS fruits. However, in no-choice bioassays, females made more visits and spent a significantly greater amount of time on LSS compared to Gola and LLS. GC–MS analysis of guava headspace revealed presence of aliphatic and aromatic esters as a dominant group of compounds in both un-infested and fruit-fly-infested guava fruits, with a higher quantity mostly occurring in fruit-fly-infested fruits. Role of guava volatiles is discussed in an ecological context of attraction and oviposition behaviors of adult females and fitness of their offspring.

本研究旨在确定番石榴果实挥发物在桃果实蝇Bactrocera zonata Saunders的吸引力，产卵和相关适应性参数中的作用，这是番石榴和许多其他水果的主要害虫。在Y型管嗅觉仪中，使用三种本地种植的番石榴品种的果实观察到了B. zonata雌蝇的吸引力。Gola，Larkana小苏拉（LSS）和Larkana大苏拉（LLS）。与对照（空白）相比，雌蝇对未侵染和被侵染的番石榴果实气味均具有明显更高的吸引力。在不同水果品种之间的成对比较中，雌性B. zonata与未侵染的LSS相比，未侵染的Gola表现出显着更高的吸引力，而在相同品种的情况下，与三个受试品种相比，未侵染的水果吸引的果蝇相比未侵染的水果要多得多。在两种选择的产卵生物测定中，B。zonata相较于LSS水果，雌性在Gola水果上造访的次数更多，产卵次数更多，花费的时间更长，并且of和成虫的数量也更多。但是，在非选择式生物检测中，与Gola和LLS相比，女性进行LSS的访问次数更多，花费的时间明显更多。番石榴顶空的GC-MS分析表明，在未侵染和果蝇侵染的番石榴果实中，脂族和芳香族酯类化合物占主导地位，其数量更多地发生在果蝇侵染的果实中。番石榴挥发物的作用在成年女性的吸引力和产卵行为及其后代的适应性的生态环境中进行了讨论。