Evaluation of Some Attractive Materials in The Management of Red Palm Weevil, Rhynchophorus ferrugineus Oliv. (Coleoptera: Curculionidae by The Pheromone Lure-Food Based on Trapping System

Document Type : Original Article

Authors

1 Dept. Plant Protect. Fac. Agric. Saba Basha, Alex. Univ.

2 Plant protection Res. Instit., Agric.Res. Center, Giza, Dokki.

Abstract

The obtained results explained that the higher or lower density of red palm weevil populations in each of inspected date palm orchards is mainly attributed to the old and the numbers of growing date palm varieties in particular, Zaghloul and Sammany ones, the old and density of interplanted fruit trees within the rows of growing palms, the followed agrotechnical practices and the prevailing agroclimatic conditions, which all in combination more or less affect on the increased or decreased population density of developing weevils that correspond to the occurring infestation level and in sequence reflects on the rate of catch weevils.
The calibrating delayed emergence of the insect pest during most months of the growing season was detected. The higher rates of catch weevils occurred during the periods of March-April, May-July and October-November in both investigated orchards. The determined efficiency of used aggregation pheromone lure with or without the tested chemical material or food baits in the tested traps proved that the utmost efficient one was the food baited pheromone trap with treacle + yeast + tap water, with total catch weevils reached to 279 and 565 insects; resembled 26.1 and 31.6% of the grand total of captured adults per year in 1st & 2nd orchards, respectively. The nextly ranked pheromone traps were those supplied by date fruits + yeast or ethyl acetate in respect, and/or the aggregation pheromone alone.
 The supplemented traps with diluted treacle + yeast, date fruits + yeast and ethyl acetate alone were to more extent unefficient and gave rather decreased rates of catch weevils.
Moreover, the data showed that the same detected higher or lower efficieny of evaluated pheromone lure food based trapping system was proved also for the determined monthly periodic intervals of efficient captures all the year round and the calculated annual means of catch adults of both sexes in the inspectd orchards.

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