Effect of Insect Growth Regulation by Spraing & Injection Treatment Methods on Larvae of Dubus Bug Ommatissus lybicus DeBerg ( Homoptera : Trupiduchidae) | ||
| journal of kerbala university | ||
| Article 1, Volume 8, Issue 0, January 2012, Pages 128-135 PDF (0 K) | ||
| Abstract | ||
| Aseries of field experiments were conducted in different date palm fields ⁄ Babylon province to evaluted the effects of growth regulators ( Applaud , Trigard and Dimilin ) in the mortality of spring nymph stages of dubas bug insect O. lybicus DeBerg by two treatment methods ( spraying methode with 1.0 , 0.5 and 0.6 g/ L. cocentration and injectionn methode with 200 g/ L. con. for each regulator ) also low concentration ( 0.2 and 0.5 g/ L. ) of these regulators were uesed to study their efficiency on the longivity and fertility of the females . the results showed : The different concentration of of growth regulators ( Applaud , Trigard and Dimilin) were very effected in the mortality of early nymph stages of O. lybicus insect.By spraying treatment the number of nymph stages reduced from 11.6 , 25.0 and 15.4 nymph / leaf befor treatment to 1.8 ,1.6 and 1.0 nymph / leaf after treatment respectivily . Trigard growth regulator more effective than other in both spraying and injection methodes , but unsignificantly . high mortality rates of 92.8% when trating with Dimilin by spraying methode , while the lowest mortality reached 39 .9 % when injection same regulater in to trunk of the tree.The number of ggs by each female were reduced to one egg per each female and reducing age of both male and female especially with 0.5 g / l. con. when treating with Applaud regulator . | ||
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