Authors: Guoqi Wen,
Athyna N. Cambouris,
Mohamed Khelifi,
Noura Ziadi,
Annick Bertrand
Identifier: CSBE19196
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Published in: CSBE-SCGAB Technical Conferences » AGM Vancouver 2019
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Description: The Colorado potato beetle (CPB), Leptinotarsa decemlineata (Say), is the most important insect pest of potato crops. Potato leaf is the major food source of the CPB and the variation in foliar chemical compositions would significantly affect the CPB?s feeding behaviors. The objective of this study was to investigate the impacts of N rate on the concentrations of sugar, glycoalkaloid, and amino acid of Russet Burbank leaves. Field experiments were conducted with N rates of 0, 60, 120, 180, and 240 kg N ha-1. The 4th leaves from the top of each plant were collected at 40, 54, 68, and 82 days after planting. Results showed that N fertilization significantly decreased the sugar concentrations due to starch transport for tuber bulking. However, the glycoalkaloid and amino acid contents increased in potato leaves with increasing N rates because these chemicals are the major N storage forms in plants. Higher potato foliar sugar and amino acid concentrations can promote the CPB growth by providing the required energy whereas the glycoalkaloid is a natural bio-insecticide that inhibits CPB feeding. Therefore, N fertilization represents a potential approach to protect potato plants from defoliation by the CPB through altering the chemical compositions of potato leaves. Further studies are still required to evaluate the effects of N fertilization on the CPB behaviors under field conditions.
Keywords: Solanum tuberosum L., Potato nutriment, Mineral nutrient, Colorado potato beetle, Pest control
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Date: 2019-07-15
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Conference name: CSBE/SCGAB 2019 Annual Conference, Vancouver, BC, 14-17 July 2019.
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Type: Poster
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Publication type: Text.Abstract
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Coverage: Canada
Language 1: en
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Rights: Canadian Society for Bioengineering
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