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Journal of Entomology
  Year: 2011 | Volume: 8 | Issue: 6 | Page No.: 566-573
DOI: 10.3923/je.2011.566.573
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Relationship Between Population of Cletus fuscescens (Walker) (Hemiptera: Coreidae), Planting Dates, Lines and Grain Amaranth (Amaranthus spp.) Phenology

O.A. Oke and T.I. Ofuya

The effects of planting dates, lines of grain amaranth and their phenological stages on Cletus fuscescens populations were studied during the growing seasons of 2009 and 2010 in the experimental field of National Horticultural Research Institute, Ibadan. Lines ‘P 373’ (Amaranthus hypochondriacus), ‘Montana-3’ (Amaranthus cruentus) and ‘D 136- 1’ (Amaranthus hybrid) were transplanted at 3 weeks old on three different planting dates which were at 2 weeks interval in a randomized complete block design replicated three times. Cletus fuscescens population levels started increasing when seeds began to form on the head of the amaranth and population levels generally peaked with 6.33 bugs in 2009 and 7.84 bugs in 2010 when the seeds were completely formed but milky. The individual effects of lines, 507.15 (2009), 539.55 (2010) and phenological stages, 116.52 (2009), 291.26 (2010) of grain amaranth significantly (p>0.05) affected Cletus fuscescens population levels with planting dates, 822.17 (2009), 1116.47 (2010) being the predominant factor. The interaction between planting dates and phenological stages (33.54) of grain amaranth was observed to be the most important factors in the first growing season: 2009 while in 2010, planting dates and lines was the most important interaction (35.36) affecting the population build up of Cletus fuscescens on grain amaranth. Planting of early flowering and maturing line early in the growing season assisted the critical phenological stage “milky seeds” to escape the high population levels of bug infestation in the field.
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  •    Bio-Ecology and Life History of Gasteroclisus rhomboidalis Boh.(Coleoptera: Curculionidae) a Pest of Amaranthus cruentus (L.) Sauer
  •    Phenology and Migration of Tef Epilachna, Chnootriba similis Thunberg; (Coleoptera: Coccinellidae) in Ethiopia
  •    Alternative Host Plants of Clavigralla tomentosicollis Stal(Hemiptera:Coreidae), the Pod Sucking Bug of Cowpea in the Sahelian Zone of Burkina Faso
  •    Biodiversity of Jumping Plant-lice of the Psyllidae Family (Hemiptera: Psylloidea) from the South Region of Cameroon: Faunistics, Phenology and Host Plants
How to cite this article:

O.A. Oke and T.I. Ofuya, 2011. Relationship Between Population of Cletus fuscescens (Walker) (Hemiptera: Coreidae), Planting Dates, Lines and Grain Amaranth (Amaranthus spp.) Phenology. Journal of Entomology, 8: 566-573.

DOI: 10.3923/je.2011.566.573






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