The annual bluegrass weevil (ABW; Listronotus maculicollis Kirby) host preference for annual bluegrass (Poa annua L.) is well documented, but ABW efficacy for annual bluegrass control in mixed turfgrass stands has not been researched. This study evaluated threshold‐based insecticide ABW control for annual bluegrass control in mixed‐species golf course fairway turfgrass. To investigate integrated pest management programs for annual bluegrass control in fairways, the effects of creeping bentgrass (Agrostis stolonifera L.) overseeding, three insecticide programs (preventative, threshold‐based, and no insecticide), and the plant growth regulator paclobutrazol (280 g ha^–1, applied monthly) were evaluated for annual bluegrass control in field experiments conducted over 2 yr on golf fairways in North Brunswick and Bloomfield, NJ. Treatments were replicated four times and arranged in a split‐split‐plot randomized block design. Overseeding (whole‐plot factor) did not affect annual bluegrass cover at either location. Paclobutrazol (split‐plot factor) reduced annual bluegrass cover each year at both locations. At the North Brunswick site, paclobutrazol resulted in 0% annual bluegrass cover, compared with 37% in the nontreated control at the conclusion of the 2‐yr experiment. Insecticide program (split‐split‐plot factor) only affected annual bluegrass cover at the North Brunswick site. In the absence of paclobutrazol, the no insecticide program had lower annual bluegrass cover (23%) than the threshold (37%) and preventative (44%) programs at the conclusion of the experiment. These findings show that monthly paclobutrazol applications during the growing season can reduce or eliminate annual bluegrass after 2 yr. This is the first study to show that omitting ABW insecticidal control can also reduce annual bluegrass, although efficacy was site specific.

中文翻译：

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一年生的蓝草象鼻虫，多效唑和过冷季节草皮草的年度蓝草控制播种

一年生禾本科象鼻虫（ABW; Listronotus maculicollis Kirby）寄主对一年生禾草（Poa annua L.）的偏爱已有充分文献记载，但尚未研究ABW在混合草皮林中控制一年生禾本科草的功效。这项研究评估了基于阈值的杀虫剂ABW防治对混合物种高尔夫球场球道草皮草的年度蓝草控制。要研究用于球道年度蓝草控制的综合害虫管理计划，蔓延的草丛（Agrostis stolonifera L.）的播种效果，三种杀虫剂计划（预防性，基于阈值的杀虫剂和无杀虫剂）以及植物生长调节剂多效唑（280 g哈^–1（每月应用一次）在北布伦瑞克（North Brunswick）和新泽西州布卢姆菲尔德（Bloomfield）的高尔夫球道上进行的为期2年的野外试验中，评估了年度蓝草的防治效果。将处理重复四次，并以拆分-分割图的随机区组设计安排。过度播种（全图因子）不会影响两个地点的年度蓝草覆盖率。多效唑（splot-plot factor）减少了这两个地点的每年蓝草覆盖率。在2年实验结束时，多效唑在北布伦瑞克（North Brunswick）地区的年蓝草覆盖率为0％，而未经处理的对照组为37％。杀虫剂计划（分裂-分裂-地积因子）仅影响北布伦瑞克站点的年度蓝草覆盖率。在没有多效唑的情况下，实验结束时，无杀虫剂计划的年度草丛覆盖率（23％）低于阈值（37％）和预防性计划（44％）。这些发现表明，在生长季节每月施用多效唑可减少或消除2年后的一年生禾本科植物。这是第一个表明，尽管功效是针对特定地点的，但省略ABW杀虫剂的控制也可以减少一年生的禾本科植物。