Hostname: page-component-cd9895bd7-fscjk Total loading time: 0 Render date: 2024-12-23T11:25:25.819Z Has data issue: false hasContentIssue false
  • English
  • Français

Levels of Resistance to the Maize Weevil, Sitophilus Zeamais (Motsch.) in Exotic, Local Open-Pollinated and Hybrid Maize Germplasm

Published online by Cambridge University Press:  19 September 2011

D. P. Giga  and
U. W. Mazarura
D. P. Giga
Affiliation:
University of Zimbabwe, Department of Crop Science, P. O. Box MP 167, Mount Pleasant, Harare, Zimbabwe
U. W. Mazarura
Affiliation:
University of Zimbabwe, Department of Crop Science, P. O. Box MP 167, Mount Pleasant, Harare, Zimbabwe
Get access

Abstract

The susceptibility of maize germplasm from CIMMYT — Mexico, Malawi and Zimbabwe — to attack by the maize weevil, Sitophilus zeamais (Motsch.) was investigated under controlled temperature (28°C) and r.h. (70–75%). An index of susceptibility (I), derived from the numbers of F1 progeny and the mean development period was used as the basis for measurement of the susceptibility. The indices of susceptibility of the CIMMYT germplasm ranged from 9.25 for Rattray Arnold (I) 8149 to 14.48 for Poza Rica 7737. Of the 17 collections of Malawi local maize evaluated MLM#20 was the least susceptible (I = 10.72), while MLM#24 was the most susceptible (I = 13.25). The least susceptible of the Zimbabwean germplasm was a local collection of an indigenous maize, Variety 8 (I = 10.61), while the most susceptible was a hybrid PNR 6334 (I = 14.74). Further, the nine Mexican materials and a local hybrid SR 52 were evaluated under field conditions in small farmers' granaries. Rattray Arnold (I) 8149 and Population 68 were the least damaged and produced the lowest numbers of weevils. Maize classified as susceptible in laboratory tests also suffered high damage levels in on-farm storage trials.

Résumé

La sensibilité des graines de maïs provenant CIMMYT — au Mexique, Malawi et Zimbabwe — à l'attaque du charançon du maïs, le Sitophilus zeamaïs (Motsch) a été étudiée sous une température de 28°C et une humidité relative de 70–75%.

Un indice de sensibilité (I), dérivé des nombres de la filiation F1 et la période moyenne de croissance ont servi de base de mesure de la sensibilité. Les indices de sensibilité des graines provenant sont de 9,25 pour le type Rattray Arnold (I) 8149 à 14, 48 pour type Poza Rica 7737. Des 17 types du maïs local collectionnés au Malawi en vue d'être évalués, le MLM # 20 était le moins sensible (I = 10,72) tandis que le MLM # 24 était le plus sensible (I = 13,25).

La moins sensible des graines en provenance de Zimbabwe était un type de maïs indigène, la Variété 8 (I: 10,61) tandis que le type le plus sensible était le type hybride PNR 6334 (I = 14,74). En outre au Mexique, les 9 échantillons locaux et 1 type hybride SR 52 ont été évalués dans des conditions des champs de petits grenière des agriculteurs. Le Rattray Arnold (I) 8149 et la Population 68 étaient les moins endommagés et produissaient le moins de charançons.

Les types de maïs prouvés sensibles lors de tests en laboratoire ont subi mêmement des dégâts très considérables dans des tests faits dans des entreposages des agriculteurs.

Keywords

Resistancemaize weevilSitophilus zeamaismaize germplasm
Type
Articles
Information
International Journal of Tropical Insect Science , Volume 12 , Issue 1-2-3: Current Topics in Tropical Entomology , June 1991 , pp. 159 - 169
Copyright
Copyright © ICIPE 1991

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

REFERENCES

Dobie, P. (1974) The laboratory assessment of the inherent susceptibility of maize varieties to post-harvest infestation by Sitophilus zeamais. J. Stored Prod. Res. 10, 183–197.Google Scholar
Dobie, P. (1977) The contribution of the tropical stored products centre to the study of insect resistance in stored maize. Trop. Stored Prod. Inf. 34, 7–21.Google Scholar
Dobie, P. (1986) Potential uses of host plant resistance. In Proc. 4th International Working Conference on Stored-Product Protection (Edited by Donahaye, E. and Navarro, S.), Moor-Wallach Press.Google Scholar
Fortier, G., Arnason, J., Lambert, J., McNeil, J., Nozzolillo, C. and Philogene, B. (1982) Local and improved corns in small farm agriculture in Belize, C.A; their taxonomy, productivity and resistance to Sitophilus zeamais. Phytoprotection 63, 68–78.Google Scholar
Golob, P. (1984) Improvements in maize storage for smallholder farmer. Trop. Stored Prod. Inf. 50, 14–19.Google Scholar
Rhine, J. J. and Staples, R. (1968) Effect of high amylose field corn on larval growth and survival of five species of stored-grain insects. J. econ. Entomol. 61, 280–282.CrossRefGoogle Scholar
Rodriguez, R. (1976) Determinacion de dano causado plagas de alamacen a variedades de maiz en Yucatan. Agriculture Tecnica in Mexico 3, 442–446.Google Scholar
Schoonhoven, A. V. (1975) Selection for resistance to the maize weevil in kernels of maize. Euphytica 24, 639–644.Google Scholar
Singh, D. N. and McCain, F. S. (1963) Relationship of some nutritional properties of the corn kernel to weevil infestation. Crop Science 259–261.Google Scholar
Serratos, A., Arnason, J., Nozzolillo, C., Lambert, J., Philogene, B., Fulcher, G., Davidson, K., Peacock, L., Atkinson, J. and Morand, P. (1987) Factors contributing to resistance of exotic populations to maize weevil, Sitophilus zeamais. Phytochemistry 13, 751–762.Google ScholarPubMed