Armoured scale,Hemiberlesia lataniaeandH. Rapax(Hemiptera: Diaspididae), infestation of kiwifruit rejected for export at two packhouses from 1987 to 1991
| Autor: | M. H. Olson, G. S. C. Gill, R. H. Blank |
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| Rok vydání: | 1992 |
| Předmět: | |
| Zdroj: | New Zealand Journal of Crop and Horticultural Science. 20:397-405 |
| ISSN: | 1175-8783 0114-0671 |
| DOI: | 10.1080/01140671.1992.10418056 |
| Popis: | Kiwifruit rejected for export because of armoured scale contamination were collected from a packhouse in Kerikeri and another in Whangarei, New Zealand from 1987 to 1991. A subsample of up to 50 scale infested fruit from each orchard was examined for scale. The 5 640 fruit which were examined yielded 14 390 scale. Latania scale, Hemiberlesia lataniae (Signoret), comprised 84% of the scale from Kerikeri and greedy scale, Hemiberlesia rapax (Comstock), 96% of the scale from Whangarei. No other scale species was found. First and second instar were the most common stages, except for the last 3 years at Kerikeri, when mature third instar predominated. The mortality of all scale stages ranged from 60 to 91%, except in 1988 at Kerikeri when a high proportion of live first instar reduced mortality to 44%. Of the supposed scale infested fruit, 56% had a single scale, 15% had no scale, and the remainder had multiple infestations. Most multiple infestations (82%) had at least one mature scale associated wit... |
| Databáze: | OpenAIRE |
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