Damage potential of two scarab species on groundnut

Rogers, D.J. and Ward, A.L. and Wightman, J.A. (2005) Damage potential of two scarab species on groundnut. International Journal of Pest Management, 51 (4). pp. 305-312.

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The damage potential of two phytophagous scarab larvae on groundnut (peanut) yield was determined. Holotrichia serrata, a root and pod feeding species from southern India, was studied in microplots while the damage potential of Heteronyx piceus, a pod feeder from Queensland, Australia, was determined by analysis of on-farm chemical-rate trials. H. serrata larva reduced groundnut yield by an average of 7.52 g/larva. In crops yielding less and more than 1900 kg/ha, H. piceus reduced yield by 4.20 and 1.43 g/larva, respectively. These damage potential estimates were used to determine provisional economic injury levels (EIL). For H. piceus, the provisional EIL is 1.67 and 4.91 larvae/row-metre in crops yielding less and more than 1900 kg/ha, respectively. For H. serrata, the provisional EIL is one H. serrata larva in 7.1m2. As more than 70% of southern India groundnut fields have Holotrichia populations greater than one larva in 1.35m2, more widespread use of chlorpyrifos seed dressing of groundnut is likely to produce regional economic benefits.

Item Type: Article
Author Affiliation: Farming systems institute, Indooroopilly sciences centre, Queensland department of primary industries, Indooroopilly,
Subjects: Plant Protection > Pests
Crop Improvement
Divisions: Groundnut
Depositing User: Mr B Krishnamurthy
Date Deposited: 09 Dec 2010 20:17
Last Modified: 29 Dec 2010 19:56
URI: http://eprints.icrisat.ac.in/id/eprint/943

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