Subscribe Now Subscribe Today
Science Alert
Curve Top
Asian Journal of Crop Science
  Year: 2014 | Volume: 6 | Issue: 3 | Page No.: 281-288
DOI: 10.3923/ajcs.2014.281.288
Facebook Twitter Digg Reddit Linkedin StumbleUpon E-mail

Impact of Host Plant Resistance and Coccinellid Predators on Cereal Aphid Abundance and Wheat Yield

J.G. Nyaanga, A.W. Kamau, R.S. Pathak and R.K. Tuey

Biological control and host plant resistance are key components of Integrated Pest Management (IPM). Little studies have however been done on their potential for integration in the management of cereal aphids in wheat. The impact of host plant resistance and coccinellid predators on cereal aphid population and wheat yield was therefore studied in outdoor cages. Two wheat varieties and two coccinellids predators Adonia variegeta and Chelomenes lunata were compared against a control. A mixed population of three cereal aphid species was inoculated onto wheat plants and newly emerged coccinellids were introduced in all plots except controls. Aphid counts were taken at five wheat growth stages. Repeated measure analysis indicated that there were significant differences in aphid counts between the cages with coccinellids and the control (F = 7.20; df 2, 12; MSE = 28; p<0.09) in 2008 and (F = 9.4; df 2, 12; MSE = 19; p<0.09) in 2009. The aphid numbers in the control (13.7) were approximately twice those in cages with beetles (7). Coccinellids and the resistant wheat variety showed a positive interaction at flowering stage (F = 25.3; df 60, 89; MSE = 3.9; p<0.01). Cages with coccinellids recorded more than 50% increase in wheat yield (F = 44; df 10, 17; MSE = 0.00004; p<0.001) in 2008 and (F = 57; df 10, 17; MSE = 0.000036; p<0.0001) in 2009 compared to the control. Wheat plant resistance and biological control could therefore be complementary strategies in IPM against cereal aphids.
PDF Fulltext XML References Citation Report Citation
  •    Impact of Plant Phenology and Coccinellid Predators on the Population Dynamic of Rose Aphid Macrosiphum rosaeiformis Das (Aphididae: Homoptera) on Rose
  •    Prevalence and Relative Abundance of Coccinellid Beetles on Mustard (Brassica campestris) Crop
  •    Population Dynamics of Predatory Insects and Biological Control of Cotton Pests in Pakistan
  •    Functional Responses of Cheilomenes propingua, C. lunata and C. sulphurea (Coleoptera: Coccinellidae) to Predation on Aphis gossypii (Homoptera: Aphididae) in Eastern Tanzania
How to cite this article:

J.G. Nyaanga, A.W. Kamau, R.S. Pathak and R.K. Tuey, 2014. Impact of Host Plant Resistance and Coccinellid Predators on Cereal Aphid Abundance and Wheat Yield. Asian Journal of Crop Science, 6: 281-288.

DOI: 10.3923/ajcs.2014.281.288






Curve Bottom