Determination of Maize Landraces for Resistance to Maize Weevil (Sitophilus zeamais Motschulsky) and Larger Grain Borer (Prostephanus truncates): A Case Study from Kenya | Chapter 11 | Emerging Issues in Agricultural Sciences Vol. 6

 This unit evaluate to screen Kenya Local Coastal Maize Landraces for Resistance to Maize Weevil (Sitophilus zeamais Motschulsky) and Larger Grain Borer (Prostephanus truncates). The maize weevil, Sitophilus zeamais, is a ever-present pest of maize and other rice crops worldwide and debris a threat to food safety in subsistence societies. Few population genetic studies have existed conducted on the maize weevil, but those that lie have shown that there is very little historical differentiation betwixt geographically dispersed populations what it is likely the species has knowledgeable a recent range expansion inside the last few hundred years. Farmers in the seaside region continue to evolve the native coastal maize landraces (LCML) regardless of the availability of improved maize assortments. In an effort to understand why farmers favour increasing LCML despite the release of enhanced maize open pollinated varieties (OPVs) and hybrids, research was conducted to analyze LCML. The goal search out test 25 LCML and 5 improved checks for maize weevil and larger seed borer opposition. The screening was carried out at Kenya Agricultural and Livestock Organization (KALRO) Kiboko, Kenya. Complete block design (CBD) was secondhand. Maize grains was disinfected of any field disease that is widespread of the LGB pest by heating in open electrical stove a 60-70°C for 2 hours and let the grain cool in the microwave overnight (use kilner jars accompanying glass lids). Maize weevil precipitated 12.2% (Kanjerenjere) - 32.4% (KDV-3) weight losses distinguished to only 5.0% (Chitweka) - 8.7% (Matsere) caused apiece LGB. This implies that, given the alike conditions, weevils are more detrimental and priority should take to controlling bureaucracy. Among Kenyan local coastal maize landraces, resistance to maize weevil and LGB different during depository. There was a consistent pattern of LGB resistance between landraces from Kwale, Kilifi, and Lamu. For the maize weevil, where opposition was widespread in the area, no specific pattern was seen. Maize weevil uncovering has lasted a lot longer than LGB, that was only discovered in the early 1990s. The susceptibleness of some improved differences to storage infections may partly disclose why peasants grow local cultivars since PH 4 is ultimate readily accessible commercial cultivar.  The objectives of differing insect opposition breeding programmes in coastal Kenya concede possibility use landraces with superior reactions to storage pests straightforwardly or as sources of fighting.

Author(s) Details:

J. B. Ndiso,
Pwani University, Kilifi, Kenya.

S. Mugo,
International Maize and Wheat Improvement Center, CIMMYT Kenya, Village Market, Nairobi, Kenya.

A. M. Kibe,
Egerton University, Egerton, Njoro, Kenya.

R. S. Pathaka,
Egerton University, Egerton, Njoro, Kenya.

P. Likhayo,
KALRO NARL, Nairobi, Kenya.

Please see the link here: https://stm.bookpi.org/EIAS-V6/article/view/11427