Comparison of susceptibility levels of poplar spieces and clones to Chaitophorus populi (Panzer) (Hem., Pemphigidae), Pemphigus spirothecae Passerini (Hem., Aphidoidea) and Camarotoscena sp. (Hem., Psyllidae)
Subject Areas : entomology and othea arthropodsM. Nikdel 1 , A. A. Dordaei1 2
1 - Research Center of Agriculture and Natural Resources of East Azarbaijan, Tabriz, Iran
2 - Research Center of Agriculture and Natural Resources of East Azarbaijan, Tabriz, Iran
Keywords:
Abstract :
Ghorigul nursery located in East Azarbaijan province, Iran, is one of the most important nurseries for poplar seedling production. Three species of poplar trees including Populus alba, P. nigra and P. x. euramericana are planted in this nursery. Chaitophorus populi L., Pemphigus spirothecae Pass. and Camarotoscena sp. are among the important poplar pests of above mentioned poplars and cause direct and indirect damage to these trees. This study carried out based on evaluation of pest density on 15 poplar clones of Populus alba, P. nigra and P. x. euramericana in natural condition during 2006. In addition, antixenosic resistance of the mentioned clones for C. populi were investigated in laboratory during 2007. Field survey results indicated that only four clones were infested to P. spirothecae that among them P. nigra miandoab was the most susceptibile and most resistant and not infected clones were belonging to P. alba species. P. alba bostanabad, P. alba marand, P. alba mianeh and P. alba miandoab were susceptible toC. populi, respectively. Eight clones belonging to the species P. x. euramericana and P. nigra, were identified as completely resistant to C. populi. Laboratory survey on antixenosis resistance of poplar clones against Ch. populi revealed that the clones of P. nigra miandoab, P. alba miandoab, P. nigra maragheh, P. alba marand and P. alba mianeh were susceptible to the pest. Therefore, the results obtained from the laboratory were nearly similar to field investigation. In the study of susceptibility to Camarotoscena sp., all clones of P. nigra with the exception of Turkish clones were susceptible but clones belong to P. alba and P. x. euramericana showed the highest resistance to the pest.
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