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Mandibular Length in Nupserha bicolor Thoms. ssp. postbrunnea Breun. (Col., Lamiidae) as the Factor in determining the Site of Oviposition in Corchorus olitorius

Published online by Cambridge University Press:  10 July 2009

N. Dutt
N. Dutt
Affiliation:
Jute Agricultural Research Institute, Barrackpore, West Bengal.
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Extract

Ovipositing females of Nupserha bicolor Thoms, ssp. postbrunnea Breun. cause loss of stem length in jute, Corchorus olitorius, by girdling the stem above and below a slit in which the egg is laid. The slit is made by two successive indentations of the mandibles. It is composed of a central pit and two lateral punctures. Girdling is restricted to that portion of the stem which falls within the stem-diameter range of 0·2 cm. to 0·4 cm.

A relationship exists between the length of the mandibles of the female, the depth of the stem tissue from the epidermis down to the periphery of the pith (extra-medullary tissue), and girdling and oviposition.

For girdling, the optimum ratio between the mandibular length and the depth of extra-medullary tissue as measured from the epidermal furrow and ridge of the stem (pentagonal in this region) is 1:0·80 and 1:0·99, respectively. Frequency of girdling gradually decreases in those regions of stem where the depth of extra-medullary tissue increases or decreases these ratios.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 47 , Issue 4 , December 1956 , pp. 777 - 783
Copyright
Copyright © Cambridge University Press 1956

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References

Beeson, C. F. C. & Bhatia, B. M. (1939). On the biology of the Cerambycidae (Coleopt.).—Indian For. Rec., N.S. (Ent.) 5, no. 1, 235 pp.Google Scholar
Duffy, E. A. J. (1953). A monograph of the immature stages of British and imported timber beetles (Cerambycidae).—350 pp. London, Brit. Mus. (Nat. Hist.).Google Scholar
Dutt, H. L. (1915). The soy bean stem-borer.—Agric. J. Bihar-Oris., 3, pp. 52–56.Google Scholar
Dutt, N. (1952). Nupserha bicolor Thorns, subsp. postbrunnea Breun.: a new pest on jute (Corchorus olitorius Linn.).—Nature, Lond., 170, pp. 287–288.CrossRefGoogle Scholar
Dutt, N. (1954). Diapause in Nupserha bicolor Thorns, ssp. postbrunnea Breun. and its bearing on infestation and control.—Jute Bull., 17, pp. 286–287.Google Scholar
Trägårdh, I. (1930). Some aspects in the biology of longicorn beetles.—Bull, ent. Res., 21, pp. 1–8.CrossRefGoogle Scholar