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A Life-history Study of the Brown House Moth, Hofmannophila pseudospretella (Staint.) (Lep., Oecophoridae)

  • G. E. Woodroffe (a1)
Extract

Hofmannophila pseudospretella is widely distributed in this country. It is a minor pest of stored foodstuffs, clothes and furnishings, and under certain conditions may give rise to a major infestation.

The egg stage is characterised by a high sensitivity to temperature and almost complete indifference to humidity. The incubation period varied from 110 days at 10°C. (90 per cent. R.H.) to 8·5 days at 27°C. (90 per cent. R.H.) and from 9·8 days at 90 per cent. R.H. (25°C.). to 14·0 days at 8·5 per cent. R.H. (25°C.). The percentage survival was greatly reduced both at very low (<3 per cent. R.H.) and at very high (100 per cent. R.H.) humidities. The survival of eggs from a single female varied from 56 to 97 per cent. under favourable conditions.

The duration of the feeding larval stage varied between 145 days at 13°C. and 71 days at 25°C. (at 90 per cent. R.H. on middlings). Larvae failed to mature below 80 per cent. R.H. at all temperatures. Larvae were reared successfully on a wide range of diets of both animal and vegetable origin, some predominantly carbohydrate, some almost entirely protein. The most rapid development occurred on dead adults and the slowest upon leather and yeast.

Under most conditions fully grown larvae entered diapause. This was characterised by a diapause moult after which the larvae assumed a typical diapause appearance. The length of the diapause was extremely variable and was determined largely by the temperature during larval growth. Larvae grown at low temperature did not enter diapause when incubated at 25°C. as fully grown larvae. The diapausing larvae were remarkably resistant to desiccation.

The duration of the pupal stage is affected by temperature but not by humidity. It lasted 98 days at 10°C. and 13 days at 28°C.

The total length of the developmental period was highly variable because of the variability in the length of the diapause under constant conditions. When the conditions throughout were 25°C. and 90 per cent. R.H. the total developmental period varied between 152 and 266 days, and at 20°C. and 90 per cent. R.H. the figures were 192 to 440 days. The developmental period was approximately 12 months under field conditions.

Under crowded conditions, mating was observed between males of H. pseudospretella and females of Endrosis lactella but none of the eggs developed.

The weight of the female at emergence was the most important factor governing the number of eggs laid. Weight of females varied between 8·2 mg. and 43·6 mg. and the egg number between 106 and 657 at 25°C. and 70 per cent. R.H. The number laid was significantly reduced at lower temperatures (10°C.) and at lower humidities (20 per cent. R.H.).

The sex ratio was found to be approximately 1:1, with a slight predominance of females.

The longevity of the fertilised adult female depended upon its weight at emergence and upon the physical conditions. Variation in weights of males was small, and the length of life of mated males could be correlated directly with the physical conditions. The mean longevity of mated females of all weights was 11·9 days at 25°C. and 70 per cent. R.H., 19·0 days at 15°C. and 70 per cent. R.H. and 9·4 days at 25°C. and 20 per cent. R.H. At 25°C. mated males lived 7·1 days on the average, and 18·8 days at 15°C.

The only important predator was the mite, Cheyletus eruditus, which destroyed numbers of eggs and young larvae.

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References
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Adkin, R. (1932). Borkhausenia pseudospretella Stt. attacking book-bindings.— Ent. mon. Mag., 68, pp. 4041.
Buxton, P. A. & Mellanby, K. (1934). The measurement and control of humidity.—Bull. ent. Res., 25, pp. 171175.
Cameron, A. E. (1938). Insect and other pests of 1937.—Trans. Highl. agric. Soc. Scot., 1938, repr. 35 pp.
Chrystal, R. N. (1932). An Oecophorid moth, Borkhausenia pseudospretella Stainton, attacking book bindings.—Ent. mon. Mag., 68, pp. 910.
Corbet, A. S. & Tams, W. H. T. (1943). Keys for the identification of the Lepidoptera infesting stored food products.—Proc. zool. Soc. Lond., (B) 113, pp. 55148.
Fisher, R. A. (1932). Statistical methods for research workers. Edinburgh.
Fraenkel, G. & Blewett, M. (1943). The basic food requirements of several insects.—J. exp. Biol., 20, pp. 2834.
Haines, F. H. (1932). Borkhausenia pseudospretella Stt. attacking book-bindings.— Ent. mon Mag., 68, p. 68.
Hinton, H. E. (1943 a). The larvae of the Lepidoptera associated with stored products.—Bull ent. Res., 34, pp. 163212.
Hinton, H. E. (1943 b). House moths feeding on dead insects in or near spider webs.—Entomologist, 76, pp. 45.
Hinton, H. E. & Greenslade, R. M. (1943). Observations on species of Lepidoptera infesting stored products. XI. Notes on some moths found in bird guano.—Entomologist, 76, pp. 182184.
Hughes, A. W. McK. (1948). Clothes Moths and House Moths.—Econ. Ser. Brit. Mus. (Nat. Hist.), no. 14 (4th edn.), 28 pp.
Laing, F. (1932). Borkhausenia pseudospretella and other House Moths.—Ent. mon. Mag., 68, pp. 7780.
Lepesme, P. (1938). Hofmannophila pseudospretella Stt. (Lep. Gelechiidae), hôte indésirable des habitations et des magasins.—Bull. Soc. ent. Fr., 42, pp. 283288. (R.A.E., (A) 26, p. 412.)
Morley, C. & Rait-Smith, W. (1933). The Hymenopterous parasites of the British Lepidoptera.—Trans. R. ent. Soc. Lond., 81, pp. 133183.
Musgrave, A. J. (1947). Entomology and the leather industry.—Progr. Leath. Sci. 1920–45, chap. 22, pp. 473485. London, Brit. Leath. Manuf. Res. Ass.
O'Farrell, A. F. & Butler, P. M. (1948). Insects and mites associated with the storage and manufacture of foodstuffs in Northern Ireland.—Econ. Proc. R. Dublin Soc., 3, pp. 343407.
Pepper, J. H. & Hastings, E. (1943). Biochemical studies on the Sugar Beet Webworm (Loxostege sticticalis L.) with special reference to the fatty acids and their relation to diapause and sterility.—Bull. Mont. agric. Exp. Sta., no. 413, 36 pp.
Richards, O. W. (1949). Parasitic Hymenoptera found in British houses, warehouses and ships.—I: Ichneumonidae.—Proc. R. ent. Soc. Lond., (B) 18, pp. 1935.
Richards, O. W. & Waloff, N. (1947). Seasonal variations in the numbers of some warehouse insects.—Proc. R. ent. Soc. Lond., (A) 22, pp. 3033.
Richardson, N. M. (1897). Dorset Clothes-moths and their habits.—Proc. Dorset nat. Hist. Fld Cl., 18, pp. 138149.
Salt, R. W. (1947). Some effects of temperature on the production and elimination of diapause in the Wheat Stem Sawfly, Cephus cinctus Nort.—Canad. J. Res., (D) 25, pp. 6686.
Squire, F. A. (1940). On the nature and origin of the diapause in Platyedra gossypiella Saund.—Bull. ent. Res., 31, pp. 16.
Strelnikov, I. (1936). Wasserumsatz und Diapause bei Loxostege sticticalis.—C. R. Acad. Sci. URSS, (N.S.) 1936 1, pp. 267271. (R.A.E., (A) 24, p. 673.)
Waloff, N. (1949). Observations on larvae of Ephestia elutella Hübner (Lep. Phycitidae) during diapause.—Trans. R. ent. Soc. Lond., 100, pp. 147159.
Waters, E. G. R. (1929). A list of the Micro-Lepidoptera of the Oxford district.— Proc. Ashmol. nat. Hist. Soc., 1928, 2nd pag., 72 pp.
Wigglesworth, V. B. (1939). The principles of insect physiology. London.
Wigglesworth, V. B. (1947). The corpus allatum and the control of metamorphosis in insects.—Nature, 159, p. 872.
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Bulletin of Entomological Research
  • ISSN: 0007-4853
  • EISSN: 1475-2670
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