The effects of grasshopper herbivory on stem water potential of threadleaf snakeweed plants were examined in two experiments on the Bernalillo watershed north of Albuquerque, New Mexico. Experiment one examined the direct effects of three grazing (0, 3 and 6 grasshoppers per plant) intensity treatments on stem water potential. Cages made of aluminum window screen and grasshoppers were placed over each plant, with stem water potential measured at day 1, 7, 12, 16. In the second experiment, plants were exposed to very high levels of grazing intensity for 48 hours with stem water potential measured after 48 hours.
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