Greenhouse Screening of Capsicum Accessions for Resistance to Green Peach Aphid (Myzus persicae)

in HortScience
View More View Less
  • 1 Department of Plant Breeding, Cornell University, Ithaca, NY 14853
  • | 2 Department of Entomology, Cornell University, Ithaca, NY 14853
  • | 3 Department of Plant Breeding, Cornell University, Ithaca, NY 14853

A greenhouse screen for resistance to green peach aphid (GPA) [Myzus persicae (Sulzer)] was done using 50 pepper (Capsicum spp.) accessions. There were significant differences among accessions for damage rating, number of aphids per plant and number of aphids per leaf. Leaf pubescence, the basis of a reported nonpreference resistance mechanism to green peach aphid infestation, failed to protect pepper accessions from GPA colonization and damage. Sources of resistance and tolerance to cotton aphid [Aphis gossypi (Glover)] supported high levels of green peach aphid infestation and exhibited considerable damage. Although no accessions provided strong resistance to aphid colonization evident by significantly reduced numbers of aphids, several commercial varieties and sources of virus resistance exhibited strong tolerance to GPA, evident as reduced damage. Tolerant varieties could be an important component in integrated pest management of green peach aphid.