Gardner, D. E. . Unpublished: New approaches to herbicide treatment of woody aliens. Hawaii Volcanoes National Park. Unpublished
ABSTRACT
In conjunction with the studies with Roundup, the resources management division acquired a new herbicide delivery device, the "Herbie," which worked on the principle of finely atomizing droplets of spray, increasing the surface area of spray droplets and making spray application more efficient as compared to conventional sprayers. The drawback with the Herbie was that the fine spray was subject to drift, necessitating its use under windless conditions. HAVO resource management requested that I experiment with the Herbie in a number of alien control situations to ascertain its effectiveness. Similarly, other new devices, the HypoHatchet and the HypoSpear, were obtained by resources management for experimentation in treating alien shrub and tree species, including silk oak, Russian olive, Christmasberry, strawberry guava, common guava, mountain apple, jambos plum, paper bark, koa haole, and similar invasive species as well as faya. The effectiveness of these devices as compared to bark frilling techniques, clear cutting with stump treatment, and stem girdling with topical herbicide spray treatment were objects of my studies. Invasive woody species characteristically resprout readily following cutting. Herbicidal treatments that not only killed aboveground portions but killed the roots and prevented resprouting were necessary. This work was conveyed to the resource manager and superintendent orally or in unpublished reports.
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HOSTS
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PATHOGENS
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