Maturity and yield responses of non-transgenic and transgenic Bt cotton to simulated bollworm injury.
作者： D. R. Cook , J. Gore , J. H. Fife , B. R. Leonard , E. Burris
DOI:
关键词: Bt cotton 、 Biology 、 Crop 、 Pink bollworm 、 Transgene 、 PEST analysis 、 Agronomy 、 Yield (wine) 、 Bollworm 、 Genetically modified crops
摘要: INTERPRETIVE SUMMARYThe bollworm is a damaging pest of cottonthroughout the United States. In past, this pesthas been largely controlled with commercialinsecticides. Recently, transgenic cotton cultivarsexpressing insecticidal protein from Bacillusthuringiensis Berliner var. kurstaki (Bt) have beencommercialized and are effective at controlling thetobacco budworm pink bollworm. However, Btcotton fields across Texas, Mid-South theU.S. Southeast required insecticide applicationsto suppress populations.Currently, no precise economic injury levels oraction thresholds established for pestsinfesting Bt cotton. The specific objectiveof study was to quantify effects bysimulating feeding during flowering ofnon-transgenic We hopedto learn what selected simulatedbollworm would on maturity yield cotton.Simulated applied weeks2, 3, 4 in 1997, weeks 3 4of 1998 significantly delayed cropmaturity non-transgenic cott on. Seedcotton yieldswere reduced when appliedduring week4 cotton.Results were similar tothose observed Simulatedbollworm offlowering 1997 resulted significantdelay crop maturity. Injury duringweeks significantlyreduced seedcotton yields cotton.These data provide valuable information abouteconomic p opulations onnon-transgenic cotton, which willallow development more actionthresholds that will improve integrated pestmanagement strategies andtransgenic cotton.ABSTRACT
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