Hostname: page-component-78c5997874-xbtfd Total loading time: 0 Render date: 2024-11-13T03:12:57.115Z Has data issue: false hasContentIssue false
  • English
  • Français

Investigations on the Cotton Bollworm, Heliothis armigera, Hübn

Part III. Relationships between Oviposition and the Flowering Curves of Food-plants*

Published online by Cambridge University Press:  10 July 2009

F. S. Parsons
Get access Rights & Permissions [Opens in a new window]

Extract

Studies of the food-plant associations of Heliothis armigera have elicited the information that, for all practical purposes, egg-laying may be considered as confined to the period of florescence. Evidence of coincidence of the oviposition and flowering curves is submitted for 21 species of short-flowering crops and 8 species of long-flowering crops. All told, records taken in nearly 1,000 crops have been consulted for the conclusions drawn.

As regards short-flowering species, the peaks, as well as the confines, of the oviposition and flowering curves are related closely. But oviposition on long-flowering species may decline while flowering is still in progress, or two or more waves of oviposition may be evident according to the number of moth flights spanned by the flowering period. The courses of oviposition on long-flowering species of crop in the given instances are interpreted through knowledge of the train of moth flights: although egg-laying in quantity occurs within the flowering period, peak layings frequently are not aligned with maximum flower production because the calendar times of moth flights are displaced in relation thereto.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 31 , Issue 2 , June 1940 , pp. 147 - 177
Copyright
Copyright © Cambridge University Press 1940

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

1.Barber, G. W. (1938). The concentration of Heliothis obsoleta moths at food.—Ent. News, 49, pp. 256–258 (R.A.E. (A) 27, pp. 179–180).Google Scholar
2.Barber, G. W. 1937. Preference of corn earworm moths for sweet corn for oviposition.—J. Econ. Ent., 30, pp. 802–803.Google Scholar
3.Bebbington, A. G. & Allan, W. (1935). Northern Rhodesia Emp. Cott. Grg. Corp. Rep. Exp. Stas., 1933–1934, p. 78.Google Scholar
4.Bedford, H. W. & Cowland, J. W. Ann. Reps., Dep. Agric. Forests, Sudan Govt., Part II, 1935, Ent. Sec., pp. 82–83; Ann. Reps., 1936, Part II, Ent. Sec., p. 48.Google Scholar
5.Clapham, A. R. (1929). The estimation of yield in cereal crops by sampling methods.—J. Agric. Sci. 19, pp. 214–235.CrossRefGoogle Scholar
6.Ditman, L. P. & Cory, E. N. (1931). The corn earworm: biology and control.—Maryland Agric. Exp. Sta., Bull. no. 328, pp. 443–482.Google Scholar
7.Filip'ev, I. N. (1930). Ann. Rep. St. Inst. Exptl. Agron., 1928–29, pp. 169–198 (in Russian) (R.A.E. (A) 18, pp. 606–607.Google Scholar
8.Hampton, F. A. (1925). The Scent of Flowers and Leaves.Google Scholar
9.Jones, E. P. (1936). Investigations on the cotton bollworm Heliothis obsoleta, Fabr.—Brit. S. Afr. Co. Mazoe Citrus Exptl Sta., Pub. no. 4a, pp. 21–82.Google Scholar
10.Marshall, J. (1936). The distribution and sampling of insect populations in the field with special reference to the American bollworm, Heliothis obsoleta, Fabr.—Ann. Appl. Biol., 23, pp. 133–152.CrossRefGoogle Scholar
11.McColloch, J. W. (1922). The attraction of Chloridea obsoleta, Fabr. to the corn plant.—J. Econ. Ent. 15, pp. 333–339.CrossRefGoogle Scholar
12.Nenyukov, D. V. (1927). Défense des Plantes, 4, pp. 12–14.Google Scholar
13.Parsons, F. S. & Ullyett, G. C. (1934). Investigations on the control of the American and red bollworms of cotton in South Africa.—Bull. Ent. Res. 25, pp. 349–381.CrossRefGoogle Scholar
14.Parsons, F. S. & Ullyett, G. C. (1934). Reps. Expt. Stas. Emp. cott. Grg. Corp., 1932–33, p. 102.Google Scholar
15.Parsons, F. S. et al. Reps. Exp. Stas. Emp. Cott. Grg. Corp., 1933–1934 et seq.Google Scholar
16.Parsons, F. S. et al. (1939). Investigations on the Cotton Bollworm, Heliothis armigera Hübn. (obsoleta Fabr.). Part I.—The annual march of bollworm incidence. Bull. Ent. Res., 30, pp. 321–338.CrossRefGoogle Scholar
17.Parsons, F. S. & Ullyett, G. C. (1936). Investigations on Trichogramma lutea, Gir., as a parasite of the cotton bollworm, Heliothis obsoleta, Fabr.—Bull. Ent. Res., 27, pp. 219–235.CrossRefGoogle Scholar
18.Parsons, F. S. & Ullyett, G. C. (1940). Investigations on the cotton bollworm Heliothis armigera, Hübn. (obsoleta, Fabr.). Part II.—The incidence of parasites in quantitative relation to bollworm populations in South Africa. Bull.—Ent. Res., 31, pp. 89–109.CrossRefGoogle Scholar
19.Parsons, F. S. & Ullyett, G. C. (1937). The constitution of nectar secreted by the extra floral glands of cotton.—Proc. R. Ent. Soc. Lond. (A) 12, pp. 151–154.Google Scholar
20.Peat, J. E. (1933–1934). Reps. Expt. Stas. (Southern Rhodesia) Emp. Cott. Grg. Corp., 1932–33, p. 153; 1933–34, p. 56.Google Scholar
21.Quaintance, A. L. & Brues, C. T. (1905). The cotton bollworm.—U.S. Dep. Agric. Bur. Ent. Bull. No. 50, 155 pp.Google Scholar
22.Sloan, W. J. S. (1938). Trials with maize traps in cotton.—Q. Agric. J., 50, pp. 635–636.Google Scholar