اختبار فعالية المبيد الحيوي Fytoma x N في مكافحة حشرة دوباس النخيل Ommatissus Iybicus De berg (Homoptera : Tropiduchidae)‎ في الجيلين الربيعي و الخريفي

Abstract EN

Dubas bug represent the most economic importance pest on date palm in Yemen.

Health and environmental risks impose serious limitations on the use of conventional chemicals.

.One possible solution is the use of natural biorational pesticides that could be safe, sustainable, eco-friendly and effective control measure, for this purpose Fytomax N( Azadirachtin 1%) has been selected for dubas bug control in date palm cultivation in 2012-2013.

Fytomax N was applied at a rate of 3ml/litre of water in the spring using HV sprayer in the area of Ghaidat Albhich in the May 11,2013 and in autumn-generation in Valley Asd Aljabel at coast of Hadramout on October22,2013 in the area of severely infested palms on which no pesticides have been used for several years.

The dominant individuals were fourth nymphal instar and adult stages present in the experimental site.

Comparisons have been made with Dimethoate 40 EC in the autumn generation, while Desirin 250EC( Deltamethrin) at spring generation at a rate of 1ml/litre water and untreated control.

The results have been statistically analyzed and in spring generation after one day ,one week and two weeks after application of Fytomax N revealed control of nymphs and adult was(81.72and85.86%),(92.14and74.89%) and (92.48and 78.32%) respectively, While Decirin 250 EC Efficacy on anymphs and adult after two weeks was (99.07and97.28% ) .

In autumn generation the dubas population was less in treatment area in compare to the untreated control plots.

The efficacy of Fytomax N on controlling nymphs and adult stages was ( 92.42, 94.0% ) and( 94.7,93.74%) on week and two weeks after application respectively , moreover , no significant deference was observed on dubas bug population decline while applied of Fytomax N and Dimethoate in the treated area.

This outstanding performance encouraged us to recommend the inclusion of Fytomax N in Dubas bug control National campaign in Yemen as a green bio-rational solution.

Future work will focus on biological aspects of Fytomax N on eggs lying,eggs hatching of dubas and its impact on the egg parasitoid Pseudoligosita babylonica