Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-25T05:57:19.610Z Has data issue: false hasContentIssue false
  • English
  • Français

SEASONAL DYNAMICS OF THE SUNFLOWER STEM WEEVIL, CYLINDROCOPTURUS ADSPERSUS (LECONTE) (COLEOPTERA: CURCULIONIDAE), ON CULTIVATED SUNFLOWER IN THE NORTHERN GREAT PLAINS1

Published online by Cambridge University Press:  31 May 2012

Laurence D. Charlet
Laurence D. Charlet
Affiliation:
Agricultural Research Service, U.S. Department of Agriculture, Department of Entomology, North Dakota State University, Fargo, North Dakota, USA58105
Get access Rights & Permissions [Opens in a new window]

Abstract

The sunflower stem weevil, Cylindrocopturus adspersus (LeConte), is a pest of cultivated sunflower in the major production areas of North and South Dakota, Minnesota, and Texas. Adults appeared in sunflower plots between 5 and 25 June in 1980–1985, when plants had 4–14 leaves. Oviposition began soon after adults were present and continued into late August. Peak densities of both eggs and adults occurred in mid-July. Larvae hatched between 6 and 11 July, when plants were in the early flower bud growth stages. Larvae fed in the sunflower stalk and moved to the stalk base or root crown to construct overwintering chambers. The seasonal patterns of the weevil’s life stages in 6 years were similar, but population densities varied. Regression equations were developed to predict larval numbers in stalks from number of adults to aid in making control decisions.

Résumé

Le charançon Cylindrocopturus adspersus (LeConte) est nuisible au tournesol cultivé dans les régions de production intense des états du Dakota Nord, du Dakota Sud, du Minnesota et du Texas. Les adultes sont apparus dans les parcelles de tournesol entre le 5 et le 25 juin de 1980 à 1985, alors que les plants avaient entre 4 et 14 feuilles. La ponte a commencé peu après l’arrivée des adultes et s’est poursuivie jusqu’à tard en août. Les densités maximales d’oeufs et d’adultes ont été observées simultanément à la mi-juillet. Les larves ont éclos entre le 6 et le 11 juillet, alors que les plants étaient aux stades initiaux de croissance des bourgeons floraux. Les larves se nourrissaient dans la tige du tournesol, se déplaçant vers la base de la tige et la couronne des racines pour y construire un abri d’hivernement. Le patron saisonnier de succession des stades du cycle vital est resté similaire durant les 6 ans, alors que les densités de population variaient. Des équations de régression sont proposées pour prévoir les nombres de larves dans les tiges à partir des nombres d’adultes, afin d’assister les prises de décisions.

Type
Articles
Information
The Canadian Entomologist , Volume 119 , Issue 12 , December 1987 , pp. 1131 - 1137
Copyright
Copyright © Entomological Society of Canada 1987

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Charlet, L.D. 1983 a. Distribution and abundance of a stem weevil, Cylindrocopturus adspersus (Coleoptera: Curculionidae), in cultivated sunflower in the northern plains. Environ. Ent. 12: 1526–1528.Google Scholar
Charlet, L.D. 1983 b. Insect stem fauna of native sunflower species in western North Dakota. Environ. Ent. 12: 1286–1288.CrossRefGoogle Scholar
Charlet, L.D. 1983 c. Ovipositional behavior and site selection by a sunflower stem weevil, Cylindrocopturus adspersus (Coleoptera: Curculionidae). Environ. Ent. 12: 868–870.Google Scholar
Charlet, L.D., and Oseto, C.Y.. 1983. Toxicity of insecticides on a stem weevil, Cylindrocopturus adspersus (LeConte) (Coleoptera: Curculionidae), and its parasitoids in sunflower. Environ. Ent. 12: 959–960.CrossRefGoogle Scholar
Goeden, R.D., and Ricker, D.W.. 1974 a. The phytophagous insect fauna of the ragweed, Ambrosia acanthicarpa, in southern California. Environ. Ent. 3: 827–834.Google Scholar
Goeden, R.D., and Ricker, D.W.. 1974 b. The phytophagous insect fauna of the ragweed, Ambrosia chamissonis, in southern California. Environ. Ent. 3: 835–839.Google Scholar
Goeden, R.D., and Ricker, D.W.. 1975. The phytophagous insect fauna of the ragweed, Ambrosia confertiflora, in southern California. Environ. Ent. 4: 301–306.Google Scholar
Goeden, R.D., and Ricker, D.W.. 1976 a. The phytophagous insect faunas of the ragweed, Ambrosia psilostachya, in southern California. Environ. Ent. 5: 1169–1177.CrossRefGoogle Scholar
Goeden, R.D., and Ricker, D.W.. 1976 b. The phytophagous insect faunas of the ragweeds, Ambrosia chenopodiifolia, A. eriocentra, and A. ilicifolia, in southern California. Environ. Ent. 5: 923–930.CrossRefGoogle Scholar
Mitchell, J.D., and Pierce, W.D.. 1911. The weevils of Victoria County, Texas, Proc. Ent. Soc. Wash. 13: 45–62.Google Scholar
Newton, J.H. 1921. A sunflower pest. 12th Annu. Rep. Sta. Ent. Colo. Circ. 35: 37–38.Google Scholar
Newton, J.H. 1922. Sunflower beetle Cylindrocopturus adspersus LeC. 13th Annu. Rep. Sta. Ent. Colo. Circ. 36: 30.Google Scholar
Oseto, C.Y., Burr, W.F., and Carlson, R.B.. 1982. Relationship of sunflower planting dates to damage by Cylindrocopturus adspersus (Coleoptera: Curculionidae) in North Dakota. J. econ. Ent. 75: 761–764.Google Scholar
Phillips, R.L., Randolph, N.M., and Teetes, G.L.. 1973. Seasonal abundance and nature of damage of insects attacking cultivated sunflower. Texas Agric. Exp. Sta. Misc. Publ. 1116. Texas A&M Univ., College Station. 7 pp.Google Scholar
Pierce, W.D. 1916. Notes on the habits of weevils. Proc. ent. Soc. Wash. 18: 6–10.Google Scholar
Rogers, C.E., and Jones, O.R.. 1979. Effects of planting date and soil water on infestation of sunflower by larvae of Cylindrocopturus adspersus. J. econ. Ent. 72: 529–531.Google Scholar
Rogers, C.E., and Serda, J.G.. 1982. Cylindrocopturus adspersus in sunflower: overwintering and emergence patterns on the Texas High Plains. Environ. Ent. 11: 154–156.Google Scholar
Rogers, C.E., Unger, P.W., Archer, T.L., and Bynum, E.D. Jr., 1983. Management of a stem weevil, Cylindrocopturus adspersus (LeConte) (Coleoptera: Curculionidae), in sunflower in the southern Great Plains. J. econ. Ent. 76: 952–956.Google Scholar
SAS Institute. 1982. SAS user's guide: statistics. SAS Institute Inc., Cary, NC.Google Scholar
Schneiter, A.A., and Miller, J.F.. 1981. Description of sunflower growth stages. Crop. Sci. 21: 901–903.Google Scholar
Schulz, J.T. 1978. Insect pests. pp. 169–223 in Carter, J.F. (Ed.), Sunflower Science and Technology. Agronomy Series 19, American Society of Agronomy, Madison, WI. 505 pp.Google Scholar