TGA in Some Potato Varieties and Relationship With Infestation Tubers by Agriotes spp ( Coleoptera :Elateridae)

Abstract

Wireworm, the common name for larval click beetles (Coleoptera: Elateridae), are a serious soil – dwelling pest of many different crops all around the world especially Potato tubers . Field studies were carried out in the middle of Iraq during 2009 – 2012 to detect and identify the species of genus Agriotes spp that attack Potato tubers (Solanum tubersum L.) , and susceptibility of some variety to infestation .The results of the susceptible of some Potato varieties (Burin , Revera , Divela , Rudolph , Alazata , Pleny ) to infestation by wireworms larvae showed that all of this varieties were infested by its , and there was no significant difference between its .The percentage of infested were 11.1 , 22.2 , 0.0 , 11.1 , 0.0 , 0.0 % in seedling stage and 8.1 , 9.2 , 10.2 , 4.0 , 5.1 , 8.8 % during growth period and in maturation stage were 4.6 , 5.7 , 15.2 , 10.2 , 8.5 , 9.0 % respectively .Estimation of solanine concentration was the same in standard and in solanine extracted from different Potato varieties .The concentrate of solanine extracted was range between 12 – 22.2 mg / 100 fresh weight.