Weed Management in Wheat by Cuscuta Alone and in Combination with Commercial Weedicides Allymax and Axial

ABSTRACT: The present study was to assess the additive effects of cuscuta (akasbel) aqueous extract alone and in combination with full and reduced doses of commercially available weedicides against weeds in wheat crop during the year 2016-2017. The study was conducted in a randomized complete block design (RCBD) with 3 replications. The results showed that hand weeding and use of weedicides Allymax and Axial (full and half recommended doses) significantly controlled all prevailing weeds and increased yield and yield contributing parameters over the weedy check/control and sole application of cuscuta aqueous extract. Hand weeding and Allymax (full dose) showed minimum weed population, relative density, fresh and dry weed biomass and higher leaf area index (LAI), leaf area duration (LAD), crop growth rate (CGR), plant height, 1000 grain weight and grain yield while net assimilation rate (NAR), chlorophyll content, number of tillers, spike length, grains spike-1 and biological yield were maximum only in hand weeding. These findings suggest that in order to attain highest wheat yield, the field should be kept free from weeds by hand weeding (if labour is not a limiting factor) or use recommended dose of weedicide Allymax for efficient weed management in wheat.

摘要：本研究于2016-2017年度开展，旨在评估单独施用菟丝子（Cuscuta，俗称akasbel）水提物，以及其与市售除草剂全剂量、减剂量联合施用时，对小麦田杂草的增效防除效果。本试验采用随机完全区组设计（RCBD），设置3次重复。结果表明，与杂草对照及单独施用菟丝子水提物相比，人工除草以及施用Allymax、Axial两种除草剂（全剂量与半推荐剂量）均可显著抑制所有优势杂草的生长，同时提升小麦产量及其构成因子。其中，人工除草与全剂量Allymax处理组的杂草种群数量、相对密度、鲜重与干重生物量均最低，叶面积指数（LAI）、叶面积持续期（LAD）、作物生长速率（CGR）、株高、千粒重与籽粒产量均较高；而净同化速率（NAR）、叶绿素含量、分蘖数、穗长、每穗粒数及生物产量仅在人工除草组达到最大值。本研究结果提示，若要获得最高小麦产量，可通过人工除草（若劳动力不受限制）或施用推荐剂量的除草剂Allymax，实现小麦田高效杂草管理。