Evaluating the Efficiency of Trichogramma Pintoii and Bacillus Thuringiensis Var. Kurstaki on Corn Stem Borer, Ostrinia Nubilalis (Lepidoptera:Pyralidae) in Corn Fields of Moghan Plain
سال انتشار: 1393
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 412
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شناسه ملی سند علمی:
JR_IJABBR-2-11_014
تاریخ نمایه سازی: 26 اسفند 1394
چکیده مقاله:
Objective: In this study the efficacy of two agent of this biological control agent of corn stem borer in corn fields compared with common synthetic insecticides Endosolfan to find a suitable alternative for chemical control of pests in corn fields. Methods: In order to evaluate the efficiency of biocontrol agents of corn stem borer ,Ostrinia nubilalis, experiment was conducted in a randomized complete block by five treatments and fourreplication, including, Indoxacarb (Avant), Trichogramma wasps, Bacillus thuringiensisvar: kurstaki, integration of Trichogramma sp. and Bt., and control as treatments number1 to 5. In treatments with parasitoid release, four days after releasing the wasps, the number of parasitized eggs was recorded. In each plot, 20 plants were randomly selectedfor recording the number of the larval holes on corn stems. The number of damaged stems was recorded on the same number of corn plants before harvest. Statistically analysis of data was carried out by using MINITAB software. Results: In treated plots byegg parasitoid wasp, the range of egg parasitism was 10 to 28 percent. The number of larval holes was 1.05, 1.30, 1.55, 1.38, and 2.04 per plant in treatments number 1, 3, 4, and 5 respectively. There was significant difference among the treatments consideringthe number of larval holes. The number of damaged stem in treatments number 1, 3, 4,and 5 were 0.17, 0.59, 0.98, 0.80 and 1.60 per plant, respectively. There was significant difference among the treatments considering the number of damaged stems. Despite this, there was no significant difference among biological control treatments in the number of larval holes and number of damaged stems. The achieved results from present study were revealed that the efficiency of the egg parasitoid wasp, Trichogramma sp. is lower than examined Bt.
کلیدواژه ها:
نویسندگان
Monireh Movahedi
Department of Entomology, College of Agriculture and Natural Resources, Science and Research Branch, Islamic Azad University, Tehran,Iran
Ghadir Nouri Ghanbalani
Mohaghegh Ardebili University, Ardebil, Iran
Hosein Ranjbar Aghdam
Biological Control Research Department, Iranian Research Institute of Plant protection, Iran
Sohrab Imani
Department of Entomology, College of Agriculture and Natural Resources, Science and Research Branch, Islamic Azad University, Tehran, Iran