Management efforts to control starry stonewort [Nitellopsis obtusa (Desvaux in Loiseleur) J. Groves] have been limited to stressing the thalli and have not been able to directly target the reproductive bulbils. Smaller-scale efforts such as the use of hand pulling can be employed, but hand pulling is not realistic for larger infestations. This research was conducted to test the effects of clipping stress on N. obtusa to provide a baseline for the effect of stress on the production of bulbils and the regrowth of thalli. Mesocosms were set up under greenhouse conditions to test the effects on N. obtusa of simulated mechanical harvesting once, twice, and four times per growing season. Different seasonal timing and frequency of clipping treatments will remove different amounts of thalli biomass. The four-clipping treatment always reduced thalli biomass in this study at both 16 and 52 wk after treatment (WAT) compared with the nontreated reference, but there was no difference among clipping treatments at 52 WAT. At 16 WAT, one clipping reduced bulbil density by 44% (Trial 1) to 50% (Trial 2), two clippings reduced bulbil density by 28% (Trial 2) to 52% (Trial 1), and four clippings reduced bulbil density by 22% (Trial 2) to 88% (Trial 1). At 52 WAT, bulbil densities were 69% and 93% lower than those of the nontreated reference Trials 2 and 1, respectively. Results from this study indicate that clipping may be effective for N. obtusa control and could impact bulbil production.

控制繁星石草 [ Nitellopsis obtusa (Desvaux in Loiseleur) J. Groves] 的管理工作仅限于对菌体施加压力，无法直接针对生殖珠芽。可以采用较小规模的努力，例如用手拔除，但对于较大的侵扰而言，用手拔除是不现实的。这项研究的目的是测试修剪应激对钝珠藻的影响，为应激对珠芽产生和菌体再生的影响提供基线。在温室条件下建立中生态系统，以测试每个生长季节模拟机械收获一次、两次和四次对钝叶猪笼草的影响。不同的季节时间和修剪处理频率将去除不同量的菌体生物量。在本研究中，与未处理的参考相比，在处理后 16 周和 52 周 (WAT) 时，四次修剪处理总是减少菌体生物量，但 52 WAT 时的修剪处理之间没有差异。在 16 WAT 时，一次剪报将珠芽密度降低了 44%（试验 1）至 50%（试验 2），两次剪报将珠芽密度降低了 28%（试验 2）至 52%（试验 1），四次剪报降低了珠芽密度22%（试验 2）至 88%（试验 1）。在 52 WAT 时，珠芽密度分别比未处理的参考试验 2 和 1 低 69% 和 93%。这项研究的结果表明，修剪可能对钝珠夜蛾控制有效，并可能影响珠芽产量。