There is an increasing requirement to breed durable resistances to woolly apple aphid (WAA) into apple cultivars. Genetically diverse apple plantings have been established in New Zealand with one aim to identify new sources of resistance to this pest, and also to allow the computation of parameters of genetic interest. Such computations are hindered by the uneven distribution of the pest in the...

woolly poplar aphid, phloeomyzus passerinii (signoret), is considered as an important and serious pest of poplar in iran and many countries. during 2002-2003, resistance and susceptibility of 12 poplar clones to p. passerinii were evaluated in hamedan province of iran. number of formed aphid colonies found in a surface unit was counted three times during a growing season. the clones populus alb...

Keywords Disease name Included diseases Definition and diagnosis criteria Differential diagnosis Frequency Clinical description Management and treatment Etiology Diagnostic methods Genetic counseling Unresolved questions References Abstract Woolly hair is a rare congenital abnormality of structure of scalp hair. It is marked by extreme kinkiness of hair in Caucasians. Woolly hair is either alre...