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Plants 2017, 6(3), 33; doi:10.3390/plants6030033

Integrating Soil Silicon Amendment into Management Programs for Insect Pests of Drill-Seeded Rice

1
Department of Entomology, Louisiana State University Agricultural Center, 404 Life Sciences Building, Baton Rouge, LA 70803, USA
2
Texas A&M AgriLife Research and Extension Center, 1509 Aggie Drive, Beaumont, TX 77713, USA
*
Author to whom correspondence should be addressed.
Received: 19 July 2017 / Revised: 1 August 2017 / Accepted: 9 August 2017 / Published: 13 August 2017
(This article belongs to the Special Issue Role of Silicon in Plants)
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Abstract

Silicon soil amendment has been shown to enhance plant defenses against insect pests. Rice is a silicon-accumulating graminaceous plant. In the southern United States, the rice water weevil and stem borers are important pests of rice. Current management tactics for these pests rely heavily on the use of insecticides. This study evaluated the effects of silicon amendment when combined with current management tactics for these rice insect pests in the field. Field experiments were conducted from 2013 to 2015. Rice was drill-planted in plots subjected to factorial combinations of variety (conventional and hybrid), chlorantraniliprole seed treatment (treated and untreated), and silicon amendment (treated and untreated). Silicon amendment reduced densities of weevil larvae on a single sampling date in 2014, but did not affect densities of whiteheads caused by stem borers. In contrast, insecticidal seed treatment strongly reduced densities of both weevil larvae and whiteheads. Higher densities of weevil larvae were also observed in the hybrid variety in 2014, while higher incidences of whiteheads were observed in the conventional variety in 2014 and 2015. Silicon amendment improved rice yields, as did chlorantraniliprole seed treatment and use of the hybrid variety. View Full-Text
Keywords: silicon amendment; rice water weevil; stem borers; seed treatment; host-plant resistance silicon amendment; rice water weevil; stem borers; seed treatment; host-plant resistance
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Villegas, J.M.; Way, M.O.; Pearson, R.A.; Stout, M.J. Integrating Soil Silicon Amendment into Management Programs for Insect Pests of Drill-Seeded Rice. Plants 2017, 6, 33.

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