Timing of insecticide applications for control of soft wax scale (Homoptera: Coccidae) on citrus

Autor:	G. S. C. Gill, M. H. Olson, B. W. Dow, R. H. Blank
Rok vydání:	1997
Předmět:	Wax biology business.industry Homoptera Ceroplastes destructor Pest control Horticulture biology.organism_classification chemistry.chemical_compound chemistry Citrus paradisi Chlorpyrifos visual_art visual_art.visual_art_medium Instar business Agronomy and Crop Science Coccidae
Zdroj:	New Zealand Journal of Crop and Horticultural Science. 25:311-317
ISSN:	1175-8783 0114-0671
DOI:	10.1080/01140671.1997.9514022
Popis:	Tarahe efficacy of four insecticide treatments—buprofezin, chlorpyrifos, 1 and 2% mineral oil, applied at four single, and a double application time, was evaluated against soft wax scale, Ceroplastes destructor Newstead, on ‘Seminole’ tangelo (Citrus paradisi (Macfadyen) × C. reticulata (Blanco)) in Kerikeri, New Zealand. Settlement of the insecticide‐sensitive ray stage (1st instar and 2nd instar) onto leaves, and the later dispersal of rays onto the wood to form the wax‐protected peak stage (3rd instar), was monitored. Spray application times on 15 and 25 January, 12 February, and 2 March 1993 corresponded to 64, 96, 100, and 50% of total ray abundance on leaves in untreated trees. Maximum ray abundance, after correcting for natural mortality, was estimated to occur on 4 February. There was no significant difference between chlorpyrifos and both mineral oil treatments which resulted in 71 and 90% control of rays, when averaged over all single and double applications, respectively. The highest l...
Databáze:	OpenAIRE
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