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Synergy of storage management with varietal productivity improvement: the case of maize in Timor-Leste

  • A. GUTERRES (a1), F. SOARES (a2), A. FATIMA (a2), L. PEREIRA (a2), J. B. BELO (a2), R. L. WILLIAMS (a3) (a4), H. NESBITT (a3) (a4) and W. ERSKINE (a3) (a4) (a5)...

Maize (Zea mays L.) is the major staple crop in Timor-Leste, but yields are low, averaging 1·0–1·7 t/ha, and losses during storage are high from maize weevil (Sitophilus zeamais Motschulsky) damage. The current research, assessing both weevil damage and management options, studied household storage of traditional and introduced maize varieties in 18 farmer groups for 33 weeks, and then evaluated the weevil damage in cobs stored for 9 months of 19 populations from different multi-location yield trials in 2007 and 2010. Storage of shelled grain in airtight containers for 33 weeks had no weevil damage on-farm. In contrast, storing shelled maize in a woven sack was the worst storage method with an average of 0·96 of grain attacked by weevils by Week 33, with local and introduced varieties damaged similarly. Shelled grain stored in a woven sack were infested significantly more than in traditional storage methods husked on the cob – above a fireplace, in a tree or an elevated house. Importantly, modern varieties were damaged more extensively by weevils than local maize types when the husked maize was stored using traditional methods. In the yield trials, grain weevil damage averaged 0·39 in both years after storage in the husk for 9 months. Varietal and location effects were significant for proportion of weevil damage, but the interaction effect was not significant in either year. The broadsense heritabilities were intermediate/high for proportion of weevil-damaged grain (H2=0·81 in 2007 and 0·59 in 2010), and there is potential that populations can be found combining a substantial yield increase with no increase in weevil susceptibility for households using traditional storage methods. For those households with access to airtight storage systems, the results emphasize the need to exploit the interaction of variety with storage method to benefit from the yield advantage of introduced varieties through the concurrent dissemination of improved seed with subsidized, airtight storage drums.

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J. L. Brewbaker & S. K. Kim (1979). Inheritance of husk numbers and ear insect damage in maize. Crop Science 19, 3236.

T. Dhliwayo & K. V. Pixley (2003). Divergent selection for resistance to maize weevil in six maize populations. Crop Science 43, 20432049.

P. Dobie (1974). The laboratory assessment of the inherent susceptibility of maize varieties to post-harvest infestation by Sitophilus zeamais Motsch. (Coleoptera, Curculionidae). Journal of Stored Products Research 10, 183197.

W. G. Eden (1952 a). Effect of kernel characteristics and components of husk cover on rice weevil damage to corn. Journal of Economic Entomology 45, 10841085.

S. García-Lara , D. J. Bergvinson , A. J. Burt , A. I. Ramputh , D. M. Díaz-Pontones & J. T. Arnason (2004). The role of pericarp cell wall components in maize weevil resistance. Crop Science 44, 15461552.

S. García-Lara , M. M. Khairallah , M. Vargas & D. J. Bergvinson (2009). Mapping of QTL associated with maize weevil resistance in tropical maize. Crop Science 49, 139149.

S. García-Lara , A. J. Burt , J. T. Arnason & D. J. Bergvinson (2010). QTL Mapping of tropical maize grain components associated with maize weevil resistance. Crop Science 50, 815825.

D. P. Giga , S. Mutemererwa , G. Moyo & D. Neeley (1991). Assessment and control of losses caused by insect pests in small farmers’ stores in Zimbabwe. Crop Protection 10, 287292.

Z. M. Gitonga , H. De Groote , M. Kassie , T. Tefera (2013). Impact of metal silos on households’ maize storage, storage losses and food security: an application of a propensity score matching. Food Policy 43, 4455.

S. K. Kim & D. K. Kossou (2003). Responses and genetics of maize germplasm resistant to the maize weevil Sitophilus zeamais Motschulsky in West Africa. Journal of Stored Product Research 39, 489505.

D. K. Kossou , J. H. Mareck & N. A. Bosque-Pérez (1993). Comparison of improved and local maize varieties in the Republic of Benin with emphasis on susceptibility to Sitophilus zeamais Motschulsky. Journal of Stored Product Research 29, 333343.

R. M. Mboya (2013). An investigation of the extent of infestation of stored maize by insect pests in Rungwe District, Tanzania. Food Security 5, 525531.

R. Williams , L. F. Borges , M. Lacoste , R. Andersen , H. Nesbitt & C. Johansen (2012). On-farm evaluation of introduced maize varieties and their yield determining factors in East Timor. Field Crops Research 137, 170177.

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The Journal of Agricultural Science
  • ISSN: 0021-8596
  • EISSN: 1469-5146
  • URL: /core/journals/journal-of-agricultural-science
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