STUDY ON BIOREGIONAL ASPECTS OF BOLLWORM, HELICOVERPA ARMIGERA (HUB.) (LEPIDOPTERA: NOCTUIDAE), IN THE COTTON FIELDS OF GOLESTAN PROVINCE

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MOJENI T.D.; BAYAT ASADI H.; NOORI GANBALANI G.; SHOJAEI M.

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Journal: Year:2005 | Volume:11 | Issue:2 Page(s): 97-116

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Title

STUDY ON BIOREGIONAL ASPECTS OF BOLLWORM, HELICOVERPA ARMIGERA (HUB.) (LEPIDOPTERA: NOCTUIDAE), IN THE COTTON FIELDS OF GOLESTAN PROVINCE

Author(s)

MOJENI T.D. | BAYAT ASADI H. | NOORI GANBALANI G. | SHOJAEI M. | Issue Writer Certificate

Keywords

HELICOVERPA ARMIGERA (HUB.)Q4

BOLLWORMQ3

BIOREGIONALQ3

COTTON AND GOLESTAN PROVINCEQ3

Abstract

Study on BIOREGIONAL characteristics of BOLLWORM Helicoverpa armigera (Hub). in the cotton fields of Golestan province was carried out during 1997 - 1999.This pest produced five generations per year and the last four generations were active on cotton. The adults were active at night. They usually laid their eggs singly on buds, apical leaf, flower bracts and boils of cotton. The newly emerged larvae were appeared after 3 - 5 days. The larval period lasts for 16 - 17.5 days with four ecdysis per five larval instars. Duration of pupae is 11 -14 day. Pupation occurs under ground in an earthen cocoon. Over wintering takes place in pupal stage as obligatory diapauses and quiescence. Pupal period for heavy specimens (0.38 to 0.44 gr) varies from 150 - 189 , and for light weighted specimens (0.22 to 0.38 gr) from 135- 162 days. The first adults were caught between 29 March to 9 April in pheromone traps. Pest activity begun from late June to early July in the cotton fields. Generation period lasted33 to 35 days. The number of eggs on cotton were789.58 in 17.6 days with mean of 44.9 per days. It seems that the high temperature (38 to 45 oc ) is an important factor decreasing number of eggs and early instars larval mortalities (98 - 100 %) on late June and early July in the cotton fields. The major natural enemies were six species which were identified as parasitoid wasp on eggs, larvae and pupae as follows: 1- Trichogramma brassicae (Bezd.) 2- T. embryophgum (Har.) 3- Habrobracon hebetor (Say.) 4- Barylypa amabilis (Tosg.) 5- B. pallida (Grav.) and 6- Ichneumon sarcitorius ( L.)

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APA: Copy

MOJENI, T.D., BAYAT ASADI, H., NOORI GANBALANI, G., & SHOJAEI, M.. (2005). STUDY ON BIOREGIONAL ASPECTS OF BOLLWORM, HELICOVERPA ARMIGERA (HUB.) (LEPIDOPTERA: NOCTUIDAE), IN THE COTTON FIELDS OF GOLESTAN PROVINCE. JOURNAL OF AGRICULTURAL SCIENCES, 11(2), 97-116. SID. https://sid.ir/paper/7649/en

Vancouver: Copy

MOJENI T.D., BAYAT ASADI H., NOORI GANBALANI G., SHOJAEI M.. STUDY ON BIOREGIONAL ASPECTS OF BOLLWORM, HELICOVERPA ARMIGERA (HUB.) (LEPIDOPTERA: NOCTUIDAE), IN THE COTTON FIELDS OF GOLESTAN PROVINCE. JOURNAL OF AGRICULTURAL SCIENCES[Internet]. 2005;11(2):97-116. Available from: https://sid.ir/paper/7649/en

IEEE: Copy

T.D. MOJENI, H. BAYAT ASADI, G. NOORI GANBALANI, and M. SHOJAEI, “STUDY ON BIOREGIONAL ASPECTS OF BOLLWORM, HELICOVERPA ARMIGERA (HUB.) (LEPIDOPTERA: NOCTUIDAE), IN THE COTTON FIELDS OF GOLESTAN PROVINCE,” JOURNAL OF AGRICULTURAL SCIENCES, vol. 11, no. 2, pp. 97–116, 2005, [Online]. Available: https://sid.ir/paper/7649/en

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