USING COVER CROPS AND SOIL AERATION TO MITIGATE IMPACT OF PHYTOPHTHORA SPP. IN MACADAMIA ORCHARDS

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dc.contributor.advisorLincoln, Noa
dc.contributor.authorTrump, Andrew Britton
dc.contributor.departmentTropical Plant and Soil Sciences
dc.date.accessioned2024-07-02T23:43:15Z
dc.date.available2024-07-02T23:43:15Z
dc.date.issued2024
dc.description.degreeM.S.
dc.identifier.urihttps://hdl.handle.net/10125/108438
dc.subjectAgriculture
dc.subjectSoil sciences
dc.subjectPlant sciences
dc.subjectAeration
dc.subjectCover Crops
dc.subjectMacadamia
dc.subjectPhytophthora
dc.subjectSoil Health
dc.titleUSING COVER CROPS AND SOIL AERATION TO MITIGATE IMPACT OF PHYTOPHTHORA SPP. IN MACADAMIA ORCHARDS
dc.typeThesis
dcterms.abstractRoot diseases caused by Phytophthora spp. have contributed to the decline in health and production of macadamia (Macadamia integrifolia) trees throughout Hawai'i. This disease has resulted in the loss of thousands of trees and threatens the future of the Hawai'i macadamia industry. Growers seek sustainable approaches to combat the impact of tree decline caused by Phytophthora spp., other than the recommended chemical controls that have seen limited adoption by Hawai'i farmers. This project evaluated the potential of using cover crops and soil aeration as cultural control methods in macadamia orchards to mitigate the impact of Phytophthora spp. A cover crop mix of cowpeas (Vigna unguiculata), sunn hemp (Crotalaria juncea), black oats (Avena strigosa), sudan grass (Sorghum drummondii), brown mustard (Brassica juncea), tillage radish (Raphanus sativus), and buckwheat (Fagopyrum esculentum) was selected as a combination designed to potentially improve soil physical, biological, and chemical properties to aid pathogen suppression. The results from this research showed that it is unlikely that cover crops and aeration alone can mitigate the impact of Phytophthora spp. in mature macadamia orchards. There were not significant differences in tree or soil health when comparing the treatments and control over the course of the two year project.
dcterms.extent41 pages
dcterms.languageen
dcterms.publisherUniversity of Hawai'i at Manoa
dcterms.rightsAll UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
dcterms.typeText
local.identifier.alturihttp://dissertations.umi.com/hawii:12086

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M.S. - Tropical Plant and Soil Sciences