|Title:||Effects of Potato Leafhopper, Empoasca fabae (Harris), and Water Stress on Alfalfa Forage Yield and Quality||Authors:||C.C. Chen
|Keywords:||alfalfa;potato leafhopper;water stress;interacting effect;苜蓿;馬鈴薯姬葉蟬;水因子;交感作用;馬鈴薯姬葉蟬和水對苜蓿產量及品質之影響||Issue Date:||Sep-1990||Publisher:||植物保護學會||Journal Volume:||32||Journal Issue:||3||Start page/Pages:||203-2l7||Source:||Plant Protection Bulletin||Abstract:||
Field experiments were conducted at two locations, Becker and Rosemount, Minnesota, USA, from 1986 through 1988. The major objective is to determine the individual and interacting effects of potato leafhopper and water stress on alfalfa yield and quality. In these experiments, increases in potato leafhopper infestation consistently reduced yield. High potato leafhopper densities were required to cause decrease in plant height. On most cuttings. potato leafhopper had no effect on leaf:stem ratio. High potato leafhopper densities caused decreased herbage digestible dry matter. Moderate water stress status usually did not affect potato leafhopper distribution in the field. Water stress consistently decreased alfalfa yield. Plant height decreased when alfalfa was grown under water stress. Leaf to stem ratio was not affected by moderate water stress. Alfalfa quality was little affected by moderate water stress. Water deficit caused earlier alfalfa flowering, but potato leafhopper did not significantly affect maturity of alfalfa. Significant interactions between yield or yield value and water or potato leafhopper treatments did not occur frequently.
|Appears in Collections:||應用動物組|
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