Resistance to the larger grain borer (Prostephanus truncatus) and yield performance in selected local maize landraces in Kenya – IJAAR

Prostephanus truncatusS.W. Munyiri, I. M.Tabu

Chuka University, P.O. Box 109-60400, Chuka, Kenya.

Egerton University, P.O. Box 536-20115, Njoro, Kenya

Key words: Resistance, larger grain borer, landraces, maize, yield.

Abstract

The larger grain borer (LGB) has continued to devastate maize grains especially in the dry and hot ecologies of Kenya. Resistance is a low cost environmentally sound avenue of pest management. Most of the improved cultivars are susceptible to the pest, and succumb to drought much faster. Local maize landraces are an important livelihood resource and form an alternative source of potential resistance for the LGB in these areas. The objective of this study was to evaluate selected local maize landraces for LGB resistance and yield performance. Laboratory screening was carried out for 25 germplasm at KARI-Kiboko field laboratory where the insects were also sourced. Prostephanus truncatus,One hundred (100) grams of maize grains were infested with 50 unsexed LGB adults. Resistance was evaluated 90 days after infestation. Field data were recorded on grain yield, 100seed weight, shelling percentage, plant height and number of ears per plant. Percentage loss in grain weight and dust weight collected after three months of storage were used as measures of LGB resistance. Data were analyzed using SAS package and means separated by Fisher’s protected LSD. CML492 was the most resistant followed by GBK- 044593, GBK-032419, GBK-032423, GBK-044611, GBK-34659 and GBK-032357. Over half the landraces gave higher yields than the local check. GBK-043731 was the highest yielding (6 t/ha). Appreciable levels of resistance against LGB were identified in the local landraces. These landraces are recommended for both production, and use in the development of LGB resistant maize in Kenya.

ijaar-v3no2-p40-47Get the original articles in Source: Volume 3, Number 2, February 2013 – IJAAR

Journal Name: International Journal of Agronomy and Agricultural Research (IJAAR)

Published By: International Network for Natural Sciences

Related Post: Evaluation of photoperiod and thermosensitive genic male sterile lines for hybrid rice seeds production in Kenya — IJAAR

Download PDF

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s