Wuttiwong, K.- on, Permkam, S., Ngampongsai, A. and Nualsri, C. 2010. Increasing of  Bean  Aphid (Aphis craccivora Koch) with Length and    Density  of  Adaxial  Hairs  in  Yard Long Bean nad Cowpea (Vigna  unguiculata (L.)Walp)   . Thai Agricultural Research Journal. 28, 1 (Aug. 2010), 13. DOI:https://doi.org/10.14456/thaidoa-agres.2010.12.