Browsing Plant Disease, 1997 - present by Title

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  • Nelson, Scot (University of Hawaii, 2008-10)
    This is perhaps the most important of the various fungal diseases affecting papaya in Hawaii. Symptoms are illustrated and control options discussed; fungicides are listed.
  • Schmitt, Donald P; Sipes, Brent S (University of Hawaii, 1998-12)
    This is a general guide to nematode pests, including those present in Hawaii. Methods of sampling for nematode assay are described.
  • Nelson, Scot (University of Hawaii, 2009-01)
    Plumeria is important to Hawaii's ornamental landscape and lei flower industries. This disease was first noted affecting plumeria leaves and causing defoliation in 1991. Control options are discussed.
  • Nelson, Scot (University of Hawaii, 2008-10)
    Various fungal diseases affect banana plants, but the most economically important ones limit marketability of the fruits. Practices to reduce disease incidence are described.
  • Nelson, Scot; Patnude, Erik (University of Hawaii, 2012-07)
    This publication illustrates the importance of potassium in palms. It provides photos of symptom and discusses causes, prevention and treatment of potassium deficiency.
  • Wang, Koon-Hui; Hooks, Cerruti R2; Ploeg, Antoon (University of Hawaii, 2007-07)
    Tagetes spp. suppression of nematodes and uses in cropping systems are described as alternatives to synthetic nematicides, which are expensive, increasingly unavailable, and have negative effects on other soil organisms.
  • Nelson, Scot (University of Hawaii, 2005-07)
    Good field sanitation, pruning to encourage ventilation, and use of copper fungicides or other registered products are advised to control this rot.
  • Nelson, Scot (University of Hawaii, 2009-02)
    Symptoms on Okinawan sweetpotato are shown, and integrated practices designed to minimize losses to farmers and marketers are recommended.
  • Nelson, Scot (University of Hawaii, 2005-09)
    This non-native rust fungus affects several native Hawaiian species of Abutilon.
  • Nelson, Scot (University of Hawaii, 2008-11)
    West Indian lemongrass (Cymbopogon citratus) is primarily grown as an ornamental and garden herb in Hawaii. This disease was first reported here in 1985; chemical control is limited to one registered product, the efficacy ...
  • Nelson, Scot (University of Hawaii, 2009-01)
    This rust of the native Hawaiian forest tree Acacia koa causes a witches' broom symptom on branch terminals. Symptoms caused by the various spore types of the fungus are listed.
  • Nelson, Scot (University of Hawaii, 2009-01)
    This disease first caused significant kava crop losses in Hawaii in the early 2000s, as large monocrops were established. Management by variety choice, site selection, polycropping, and fungicide sprays is described.
  • White, Ferol; Motomura, Sharon; Miyasaka, Susan; Kratky, B A (University of Hawaii, 2013-04)
    This guide outlines how to grow disease-free ginger in 7-gallon pots.
  • Nelson, Scot (University of Hawaii, 2008-10)
    These mold fungi do not infect plant tissues but feed on honeydew produced by sap-sucking insects; their damage is cosmetic, but they do reduce photosynthesis when covering leaf tissues. Examples of the mold on kava, noni, ...
  • Nelson, Scot (University of Hawaii, 2005-09)
    Stem wounding in a moist environment causes a conspicuous black stain seeping down from the wound.
  • Wang, Koon-Hui; Hooks, Cerruti RR (University of Hawaii, 2009-06)
    Spiral, burrowing, reniform, root-knot, and lesion nematodes are found on banana roots in Hawaii. Heavy infestations can cause significant yield reductions. Root-knot nematodes were found on all farms surveyed, but a ...
  • Melzer, Michael J; Tripathi, Savarni; Matsumoto, Tracie; Keith, Lisa; Sugano, Jari; Borth, Wayne B; Wieczorek, Ania; Gonsalves, Dennis; Hu, John S (University of Hawaii, 2012-04)
    This article describes the symptoms and spread of tomato spotted wilt, management techniques, and the future of biotechnology in the fight against tomato spotted wilt.
  • Uchida, Janice Y; Ogata, Desmond; Nagata, Norman (University of Hawaii, 1999-06)
    TWSV, vectored by thrips, was noticed on anthurium; the publication describes the infection and shows the resulting water-soaked spots and blights on leaves.
  • Hooks, Cerruti R2; Wright, Mark G (University of Hawaii, 2008-01)
    Cucurbit crops are affected by several insect-vectored virus disorders and phytotoxemias resulting from insect feeding. Results of a field experiment with zucchini in monoculture or interplanted with either a white clover ...
  • Nelson, Scot; Sewake, Kelvin (University of Hawaii, 2008-08)
    A new vent opened in Kilauea volcano on the island of Hawaii increased emissions of sulfur dioxide into the atmosphere in early 2008. The publication discusses the effects of the increased volcanic output on foliar injury ...
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