Effect of Adding Mineral Oil to the Effectiveness of Permethrin Emulsion Spray Droplets on Plutella xylostella Larvae

Omar, Dzolkhifli (1993) Effect of Adding Mineral Oil to the Effectiveness of Permethrin Emulsion Spray Droplets on Plutella xylostella Larvae. Pertanika Journal of Tropical Agricultural Science, 16 (1). pp. 41-44. ISSN 0126-6128

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Abstract

The effectiveness of permethrin emulsion spray droplets with (10% v/v) and without mineral oil was evaluated in the laboratory by bioassay using larvae ofPlutella xylostella. A microtip nozzle was used to produce spray droplets ranging from 52 - 274 ~m in volume median diameter. The 2nd instar larvae were placed on treated leaf discs, and knockdown and mortality were recorded after 1 hand 24 h respectively. In both treatments, as droplet size decreased the dose also decreased without losing the effectiveness ofpermethrin indicating that small droplets were more ejjicient than large droplets. VVhen sprayed using droplet size between 70 ~m to 100 ~m, there was no increase in the effectiveness ofpermethrin from emulsion spray droplets plus mineral oil compared to emulsion spray droplets alone. However, for droplet sizes greater than 125 ~m, the effectiveness was reduced.

Item Type:Article
Keyword:permethrin, mineral oil, spray droplets, Plutella xylostella
Publisher:Universiti Putra Malaysia Press
ID Code:3102
Deposited By: Nasirah Abu Samah
Deposited On:24 Nov 2009 01:37
Last Modified:27 May 2013 07:05

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