Effects of Aphthona flea beetles and sheep grazing in leafy spurge stands (summary)
TL;DRAbstract
The objectives of this experiment include: 1) documenting individual effects of Aphthona spp. populations in leafy spurge stands; 2) documenting effects of both agents acting together in leafy spurge stands; and 3) determining if sheep grazing has a detrimental impact on establishment of Aphthona spp. populations. Two Montana sites have been utilized: the Raynesford site in Judith Basin Co., and the Story Hills site in Gallatin Co. At both sites, a randomized complete block design has been employed, using square plots (blocks) roughly 15.3 m (50 feet) on a side. Twelve plots were established at each site, representing three replications of four experimental treatments. The four treatments are: 1) Aphthona spp. flea beetles alone; 2) sheep grazing alone; 3) Aphthona flea beetles and sheep grazing; and 4) no beetles or grazing (control). All plots experiencing grazing were fenced to confine sheep.
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The objectives of this experiment include: 1) documenting individual effects of Aphthona spp. populations in leafy spurge stands; 2) documenting effects of both agents acting together in leafy spurge stands; and 3) determining if sheep grazing has a detrimental impact on establishment of Aphthona spp. populations. Two Montana sites have been utilized: the Raynesford site in Judith Basin Co., and the Story Hills site in Gallatin Co. At both sites, a randomized complete block design has been employed, using square plots (blocks) roughly 15.3 m (50 feet) on a side. Twelve plots were established at each site, representing three replications of four experimental treatments. The four treatments are: 1) Aphthona spp. flea beetles alone; 2) sheep grazing alone; 3) Aphthona flea beetles and sheep grazing; and 4) no beetles or grazing (control). All plots experiencing grazing were fenced to confine sheep.
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