Affiliation:
1. University of Kashmir, Faculty of Biological Sciences , Department of Zoology, Section of Entomology , Srinagar - , India
Abstract
ABSTRACT
This paper deals with the studies on the biology and development of the bark beetle Ips stebbingi Strohmeyer, 1908 (Coleoptera: Curculionidae: Scolytinae), a pest of Himalayan blue pine Pinus wallichiana A.B.Jacks. in Kashmir Himalaya. This pest is an aggressive and notorious one, but little is known of its biology. This beetle pest overwinters in adult stage under the bark of host trees P. wallichiana. After emergence, the adults fly to suitable trees and undergo maturation feeding for 4–6 days. Reproduction is polygamous type; two to six females join a male in his nuptial chamber. After mating, each of the females makes one gallery with an average length of 10.76 (±3.30 standard deviation [SD]) cm. The female lays 23.16 (±7.03 SD) eggs on an average. The eggs hatch in 8–18 days. The larvae have five instars and complete their development in 30–45 days constructing larval galleries of 3.83 (±0.63 SD) cm in length. The larvae pupate for 18–28 days and finally the adults emerge to attack new suitable trees. The adults live for 45–70 days, and the total lifespan of this species ranges from 101 to 156 days. The seasonal distribution of various life stages and the number of generations were also recorded.
Reference22 articles.
1. Beaver, R.A. 1967. Notes on the biology of the bark beetles attacking elm in Wytham Wood, Berks. Entomologist’s Monthly Magazine, 102, 156–162.
2. Bentz, B.J. et al. 2010. Climate change and bark beetles of the western United States and Canada: Direct and indirect effects. BioScience, 60 (8), 602–613.
3. Buhroo, A.A., Lakatos, F. 2007. On the biology of the bark beetle, Scolytus nitidus Schedl (Coleoptera: Scolytidae) attacking apple orchards. Acta Silvatica et Lignaria Hungarica, 3, 65–75.
4. Buhroo, A.A., Lakatos, F. 2011. Molecular and morphological diagnostic markers for the Himalayan Ips DeGeer species (Coleoptera: Curculionidae: Scolytinae). Zootaxa, 3128, 47–57.
5. Caltagirone, L.E., Getz, W., Meals, D.W. 1983. Head capsule width as an index of age in larvae of navel orangeworm, Amyelois transitella (Lepidoptera: Pyralidae). Environmental Entomology, 12, 219–221.