Butler (Butler)

Phytophthora palmivora OCT08 wilt), (fruit rot), pod (Figa), canker, cherelle Important horticultural hosts includecocoa (black agricultural crops. It isalso a common soilinhabitant. species includingornamental, horticultural and P. palmivorainfects a thousand or more plant Host Range: sporangiophores. pedicels. Thesporangia form on sympodial species because they are caducous and haveshort canbewhich distinguished from other P. palmivora Key Distinguishing Features: through seedlingblight. nursery, thepathogencanleadtoheavylosses d),andcankers (Fig leaf fruit blights rot. In the Symptoms includeroot rots, collar rots, stem importanteconomically tropical fruit crops. and asa result can cause significant losses inmany P. palmivora Impact: (budrot). c),(Fig (canker),blackpepper (foot rot)and Saul-Maora (2008). Diversity of of Diversity (2008). Saul-Maora andManagement of Diversity Guest (2004) Drenth, Further Reading: losses to farmersof tropicalfruitandcrops. vegetable The pathogen isbelieved to haveoriginatedinSoutheast Asiabut isnowpantropical. It causes significant palmivora Classification: Diseases Fig. a. +675 9839131+675 CCI-PNG Saul 9351Josephine 02 2937; Ph: Sydney. of University Guest, KeyDavid and Daniel Contacts: Rosalie worldwide. diseases (1996) Phytophthora Ribeiro Erwin, carry Phytophthora into the into canopy. Phytophthora carry ( Black pod of cocoa; podof Black fruit rotb), (Fig (heart canker)pineapple rot : Fruit rots, stem cankers, leaf and blights seedling and root rots of tropical plants. thrives under humidwet conditions, has conspicuous papillate sporangia, D: Eukaryota, K: Stramenopila, C: Oomycota, O: , F: Pythiaceae Pathogen ofthemonth Pathogen ofthemonth is a ubiquitouspathogen causing manydifferent diseases on a widerangeof plants. b. fruit rot offruit durian; Phytophthora palmivora Phytophthora Phytophthora c. heart rot on pineapple onpineapple rot heart Phytophthora Phytophthora in Papua New Guinea. PhD Thesis, University of Sydney. of University Thesis, PhD Guinea. in Papua New St Paul, USA, American Phytopathological Society Press. Society Phytopathological St Paul,USA, American Chemicals used in theChemicals control of as part of anintegrated strategy.management soil healthby increasingorganicmatter can beused improve air flow andreduce humidityandimproving infected planting material andweeds), pruning to completeharvesting(including and the removal of varieties, improved nurseryhygiene,sanitation cultural and chemical methods. The use of resistant Phytophthora palmivora Management: weather. rainsplash, contact and vector activity(Fige) inhumid andinoculum spreadsrapidlythrough wind canopy of trees, where symptoms appear. Secondary the rain splash, insects and human activityinto plant material. The pathogen isdisseminated through originates fromPrimary inoculum the soil andinfected Dissemination andspread: injection orspray. foliar injection asa soil drench, trunk cankers, and phosphonates orcopper hydroxide to paint phosphonates, metalaxyl in Southeast Asia. ACIAR Monograph No. 114,238p. No. Monograph ACIAR SoutheastAsia. in d. Stem canker on a jackfruit tree; tree; jackfruit ona canker Stem – – October October can be managed using P. palmivora P. palmivora e. 2008 2008 ant trails include