Koizumi, S., Zenbayashi, K., Ashizawa, T., (2001). 52nd Annual Report of the Society of Plant Protection of North Japan, 4-6. Society of Plant Protection of North Japan, Akita, Japan. Japanese language
Carmona, R., Murdoch, A. J., (1998). Aspects of Applied Biology(No. 51), 179-186. English language