Thrips (Thysanoptera) Seasonal Flight Activity and Infestation of Ripe Stonefruit in Canterbury, New Zealand
| Autor: | D. R. Penman, David A. J. Teulon |
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| Rok vydání: | 1996 |
| Předmět: | |
| Zdroj: | Journal of Economic Entomology. 89:722-734 |
| ISSN: | 1938-291X 0022-0493 |
| DOI: | 10.1093/jee/89.3.722 |
| Popis: | The seasonal flight activity and infestation of ripe peach, nectarine, and apricot fruit by thrips, especially the New Zealand flower thrips Thrips obscuratus (Crawford) (Thysanoptera: Thripidae) were investigated in a mixed stonefruit orchard during 3 seasons in Canterbury, New Zealand. Water trap samples indicated T. obscuratus adult numbers were low in spring (September and October), increased gradually during early summer (November and December), peaked in midsummer (mid-January), and declined in late January, with a period of moderate to low numbers throughout late summer and autumn (February through May). Numbers were lowest in winter (June through August). Other common thrips species in water traps included onion thrips, Thrips tabaci Lindeman; grain thrips, Limothrips cerealium (Haliday); and Haplothrips niger (Osborn). T. obscuratus adults (almost all females), eggs, and larvae were common on ripe peaches, nectarines, and apricots. L. cerealium adults were found on ripe fruit in small numbers but few thrips of other species were found. T. obscuratus eggs, larvae, and adults were found on fruit up to 3 wk before harvest but were most numerous on ripe fruit. T. obscuratus numbers were highest on fruit of stonefruit varieties that ripened during December and January, the time of peak seasonal flight activity, compared with varieties that ripened during February, March, and April. T. obscuratus adults trapped in orchard blocks appear to have originated from outside the orchard. Factors important to the population dynamics of T. obscuratus are discussed as well as economic implications. |
| Databáze: | OpenAIRE |
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