Showing papers in "Applied Entomology and Zoology in 1989"

Comparison of the infectivity of Steinernema kushidai (Nematode: Steinernematidae) and other steinernematid and heterorhabditid nematodes for three different insects.

Abstract: The infectivity of Steinernema kushidai was compared with that ot' othcr steinernematid and hctcrorhabditid nematodes for threc diffbrend, insects, There wcre significant diflercnccs bcLwcen thc infectivites of S. kushicini a d othci' nematodes, tested in this study, for wax moth larvae, Catteria rnelgoneUa, searabacid beetle larvae, Anomala cmprea, and Japanese pine sawyer adults and larvae, ildbnochamus alternattts. Steinernema hashidai was the rnosL inl'ectious ncmatocle for A. c'mpxea larvae both on wet filter paper and in soil. S. bibionis, S. .fbltiae, S. glaseri, S. intermedia, and Ifeterorhabditis hetiethidis were not int'ect{ve for A. dmprea, S, kushidoi was lcss infhctivc for C, melloneiga larvae and M. alternatus arfu]ts and larvae than the other nematode species. S. kushidei required rnore timc to kill host insects than did other ncmatedes. Development of S. kushidai in insect cadavers in gcneral diillered from that of other steinernematids by lack ofsccond generation adults, Interspccific variation in thc infectivity

Control of the Beet Armyworm, Spodoptera exigua(HUBNER)(Lepidoptera : Noctuidae), Using Synthetic Sex Pheromone : IV. Effect of Communication Disruption in Welsh Onion Fields in 1988

Abstract: thetic sex pheromone were successful against several pests on fruit trces, tea and cruciferous vegetables in Japan COHTArsHi, 1986; FvRuNo, 1986; SATo, I986). Subsequently, some pest control agents have been developed. The beet arymworm, SPodoptera exigua, has been a serious pest of vegetables and ornamental creps in southwestern Japan since the early l980's (HoRimRi, 1986; TAKAr, 1988a, 1989). This insect is diMcult to control by spraying insecticides because of insecticide resistance (TAKAi, 1988b). In 1987, communication disruption using synthetic sex pheromone was demonstrated to be an effbctive tool for control of the beet armyworm in Welsh onion, AlliumYistulosum L., fields (WAKAMuRA et al,,