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An investigation of post-activation potentiation (PAP) on 100-meter (m) sprint performance following a set of heavy-(four repetition maximum (4RM)) loaded parallel back half-squat exercises in collegiate females

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Title: An investigation of post-activation potentiation (PAP) on 100-meter (m) sprint performance following a set of heavy-(four repetition maximum (4RM)) loaded parallel back half-squat exercises in collegiate females
Authors: Linder, Elizabeth E.
Issue Date: 2007
Abstract: A review of several cultural management strategies for managing of aphids, whiteflies, and their associated diseases and phytototoxemias was conducted. The use of reflective mulches has been extensively studied and is being successfully used to help manage aphids, whiteflies and other insect pests. Manipulation of planting date or crop sanitation alone did not consistently reduce insect pest populations. However, cultural tactics such as alteration of soil fertility, conservation tillage and crop diversification often reduced aphid and whitefly densities on the cash crop. Cultural management tactics applied singly often suppressed insect pest densities but did less often improved plant health and yield. The feasibility of integrating one or more cultural control tactics to suppress insect pest densities as well as improve plant health is being discussed.
Field experiments were conducted to evaluate the effects of several companion plants on population densities of the whitefly, Bemisia argentifolli Bellow and Perring and the incidence of squash silverleaf disorder in zucchini, Cucurbita pepo L. on Oahu, Hawaii. Two cover crops, buckwheat Fagopyrum esculentum Moench and white clover Trifolium repens L. or sunn hemp, Crotolaria juncea L. and an intercropped vegetable, okra Abelmonchus esculentus (L.), were evaluated as companion plants during 2005 and 2006, respectively. Population densities of whiteflies varied during the two field studies. Zucchini intercropped with okra had lower numbers of adult whiteflies and resulted in significantly lower severity of silverleaf symptoms than the cover crop habitats in 2005. During 2006, zucchini grown with sunn hemp had significantly lower numbers of all whitefly stages (egg, immature and adult) and less silverleaf severity symptoms than buckwheat.
The potential of barrier plants to reduce the density of aphid and incidence of aphid transmitted non-persistent virus (ATNPV) in zucchini, Cucurbita pepo L. was evaluated during 2005 and 2006 on Oahu, Hawaii. Two cover crops, buckwheat Fagopyrum esculentum Moench and white clover Trifolium repens L., or sunn hemp, Crotolaria juncea L. and an intercropped vegetable, okra Abelmonchus esculentus (L.), were evaluated as barrier plants during the studies. Results of the field experiments showed that densities of alatae aphids in water pan traps did not differ significantly among treatment habitats during both study years. However, foliar counts of aphids were significantly less in dicu1ture than monoculture habitats during 2006. Higher abundances of the aphid predators, coccinelids and chrysopids, were found in monoculture than diculture habitats during 2006. The percentage of zucchini plants showing virus symptoms was significantly lower in diculture than monoculture habitat during both years. Results from field and laboratory experiments supported the hypothesis that barrier plants protected zucchini plants from NPVs by acting as a virus sink.
Field experiments were conducted to examine the effect of companion plants on zucchini (Cucurbita pepo L.) growth rate and marketable yield on Oahu, Hawaii. Two cover crops, buckwheat (Fagopyrum esculentum Moench) and white clover (Trifolium repens L.) or sunn hemp, (Crotolaria juncea L.) and an intercropped vegetable, okra (Abelmonchus esculentus (L.», were evaluated as companion plants during 2005 and 2006, respectively. Results from year I showed that zucchini grown with cover crops had significantly larger plant compared to intercropped okra. During year 2, zucchini plant size was significantly larger in sunn hemp habitat compared to buckwheat. Marketable fruit yields were also significantly higher in zucchini grown with cover crop habitats compared to intercropped okra during year 1. However, there was no effect of treatment on marketable fruit yield during Year 2.
Description: Thesis (M.S.)--University of Hawaii at Manoa, 2007.
Includes bibliographical references (leaves 70-75).
x, 75 leaves, bound 29 cm
URI/DOI: http://hdl.handle.net/10125/20651
Rights: All 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.
Appears in Collections:M.S. - Kinesiology and Leisure Science



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