Development of a Postharvest Cold Treatment for Cryptophlebia peltastica (Lepidoptera: Tortricidae) for Export of Litchis From South Africa
| Autor: | Sean D. Moore, Wayne Kirkman, Sean R. Thackeray, Mellissa Peyper, S. Albertyn, Tamryn Marsberg, Martin Hill |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Tortricidae Moths 01 natural sciences Insect Control 040501 horticulture Lepidoptera genitalia Litchi Animals Phytosanitary certification Ecology biology business.industry Pest control 04 agricultural and veterinary sciences General Medicine biology.organism_classification Cold Temperature 010602 entomology Horticulture Insect Science Postharvest Instar PEST analysis 0405 other agricultural sciences business False codling moth |
| Zdroj: | Journal of economic entomology. 111(6) |
| ISSN: | 1938-291X |
| Popis: | The litchi moth, Cryptophlebia peltastica (Meyrick) (Lepidoptera: Tortricidae), is endemic to sub-Saharan Africa and certain Indian Ocean islands. It is an important pest of litchis and to a lesser extent macadamias. Litchis are exported to certain markets that consider C. peltastica as a phytosanitary pest. Consequently, an effective postharvest phytosanitary treatment is required. This study sought to develop a cold disinfestation treatment for this purpose. First, it was established that the fifth instar was the most cold-tolerant larval stage, as it was the only instar for which there was still some survival after 12 d at 1°C. It was then determined that cold treatment trials could be conducted in artificial diet, as there was no survival of fifth instar C. peltastica in litchis after only 9 d at 1°C, whereas it took 15 d at this temperature before no survival of fifth instar C. peltastica was recorded in artificial diet. Consequently, cold susceptibility of fifth instar C. peltastica and the most cold-tolerant larval stages (fourth and fifth instar) of false codling moth, Thaumatotibia leucotreta (Meyrick) (Lepidoptera: Tortricidae), were compared in artificial diet. There was no survival of C. peltastica after 13 d at 1°C, whereas this was only so for T. leucotreta after 16 d. Consequently, it can be concluded that any cold treatment that has been proven effective against T. leucotreta would be as effective against C. peltastica. Finally, it was confirmed that the cold susceptibility of T. leucotreta in artificial diet did not overestimate the effect of cold on T. leucotreta larvae in litchis. |
| Databáze: | OpenAIRE |
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