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Integrating flood depth and plant resistanc. with c.lorantraniliprole seed treatments for management of ric. water weevil, Lissorhoptrus oryzophilus （c.leoptera： c.rc.lionidae）

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Insec. Sc.enc. 2015年第5期22卷 679-687页

作者： srinivas k. lanka david c. blouin michael j. stout Department of Entomology Louisiana State University Agricultural Center Baton Rouge LA 70803 USA

c.lorantraniliprole seed treatments in ric. provide effec.ive suppression of ric. water weevil populations in the United States; however, heavy relianc. on prophylac. tic.insec.ic.de treatments as a sole strategy c.uld destabilize management programs for this insec.. The present researc. evaluated the c.mpatibility of seed treatments with two other potential management tac.ic.--plant resistanc. and shallow flooding-by c.nduc.ing two split-plot experiments in 2009 and 2011. In both experiments, no substantial antago- nism was found among the 3 different tac.ic.. Statistic.l interac.ions in these experiments arose from the strong and persistent effec.s of c.lorantraniliprole on larval densities rather than inc.mpatibility of tac.ic.. In 2009, weevil densities differed among varieties and were signific.ntly lower on the c.ltivar ＂j.fferson.＂ In 2011, weevil densities were reduc.d sig- nific.ntly in shallow-flooded plots c.mpared to deep-flooded plots. Signific.nt reduc.ions in weevil numbers by c.lorantraniliprole seed treatments, even at applic.tion rates 5 fold lower than c.mmerc.ally rec.mmended rates, demonstrated the potential to reduc. appli- c.tion rates of this highly potent larvic.de. These latter results suggest that future studies on the relationship between c.lorantraniliprole seed treatment rate and weevil fitness are warranted.

关键词： c.lorantraniliprole c.mpatibility integrated management plant resistanc. ric. water weevil seed treatments

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