4.4 Article

Host plant stimuli effects on survival and duration of dormancy of Rhagoletis zoqui, Rhagoletis completa (Diptera: Tephritidae) and associated parasitoids

期刊

BULLETIN OF ENTOMOLOGICAL RESEARCH
卷 112, 期 3, 页码 318-326

出版社

CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0007485321000778

关键词

Dormancy; host stimulus; juglone; Walnut husk flies

资金

  1. International Atomic Energy Agency [18331/R0]
  2. Mexican Campana Nacional contra Moscas de la Fruta, Mexican Ministry of Agriculture (SADER) via the National Consultative Phytosanitary Council (CONACOFI) [41011-2017, 41012-2018, 41013-2019]
  3. Instituto de Ecologia AC

向作者/读者索取更多资源

This study investigated the effects of host plants on the dormancy duration of Rhagoletis fruit flies and their parasitoids. The results showed that host plants had little impact on the survival and dormancy duration of the fruit flies, while juglone was toxic to pupae of one species. The fruiting phenology of host plants appeared to play a greater role than host plant-derived cues in selecting the time of fly emergence.
Tephritid fruit flies in the genus Rhagoletis bridge between predictable periods of fruit availability by becoming dormant. To cope with acyclic unpredictable events (e.g., frost, mast seeding, etc), a proportion of the population can undergo prolonged dormancy. In the case of walnut infesting Rhagoletis, host plant-derived cues such as juglone soil concentration vary seasonally in predictable patterns. Here, we examined the effects of host plant parts and derived compounds on emergence rates and dormancy duration of Rhagoletis completa (Cresson), Rhagoletis zoqui (Bush) (Diptera: Tephritidae), and associated parasitoids. Pupae of both species were exposed to walnut leaves, fruit, or fruit and leaves and compared to a control. In a second experiment, R. zoqui were exposed to 10 mg l(-1) of juglone applied to pupation medium during four consecutive 4-week time periods under variable combinations of temperature and frequency of exposure. Overall, the presence of fruit resulted in greater overwintering survival of R. completa but had no effect on the duration of dormancy of either fly species. Application of juglone over two consecutive periods produced greater mortality of R. zoqui than the control. Three parasitoid species emerged from R. completa and one from R. zoqui. Duration of dormancy for parasitoids was longer than that of fly hosts. Regardless of treatment, 13.3-18.4% of R. completa pupae and 1.3-2.8% R. zoqui engaged in prolonged (>year) dormancy. Our results indicate that host plant derived cues have little or no effect on survival and duration of dormancy of walnut infesting Rhagoletis, and at the tested concentration juglone is toxic to R. zoqui pupae. Testing the effect of juglone at lower concentrations is necessary to rule out its role as an environmental cue for regulation of dormancy. So far, host plant fruiting phenology appears to play a greater role than host plant derived cues in selecting for fly eclosion times.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.4
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据