plant diseases reported on the island of guam d · davi/dasp fern gloeosporium sp f delonixregia...

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PLANT DISEASES REPORTED ON THE ISLAND OF GUAM

G. C. Wall Plant Pathologist

Western Pacific Tropical Research Center College of Natural and Applied Sciences

University of Guam

Technical Report 2007

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Foreword This is a compilation of information on plant pathogens identified and reported to be present on the island of Guam up until the time of publication. It is intended for general use, particularly of interest to agricultural workers, quarantine personnel, students and the public in general.

The fragile ecosystem in our tropical island demands that we guard our borders with zeal because any invasive species that gains access is very likely to take root and multiply. History is full of accounts of plant disease epidemics affecting humanity, causing famines, wars, migrations and even death.

In an ecosystem such as in a tropical island, removing one plant species by the introduction of a pest may upset the delicate balance of the entire ecosystem; other species, whether plant, animal, or microbial, that were depending on the eliminated species for food or shelter will also become imbalanced. Humans depend on the ecosystem in many ways: food production (not all plant species), shelter from the sun, from storms, prevention of erosion, etc. Erosion not only washes away the only soil for thousands of miles around, it harms the reef as well, which protects the island from wave action. It is all inter-connected.

Losses caused by plant diseases at the end of the 20th century were estimated at 13.6% of total world production. Control of plant diseases, when it is available (not always possible), may be costly in terms of pesticide prices and labor costs; furthermore, there is usually an environmental side-effect that comes with the use of pesticides, such as run-offkilling coral reef species, or contamination of drinking water, etc. The best and first line of defense against plant diseases is exclusion, or keeping them out in the first place. The fewer plant diseases we allow into Guam, the fewer plant diseases our farmers and homeowners need to control.

The information is based on the author's notes over more than 20 years at UOG and on the publications listed in the reference list below. When only a genus name appears and no species name is given for a particular pathogen, an identification to species could not be verified.

Sincerely,

George C. Wall, Ph. D. Professor CNAS, University of Guam November, 2007

Acknowledgement Many thanks are due to all Extension Agents at ANR, UOG. Also, I would like to acknowledge the help of so many scientists throughout the world who have helped make numerous identifications, or who have offered their support in one way or another. Special thanks go to my research assistants and gardeners at the Plant Pathology Lab who have given their valuable support since 1986. Si Yu'us Ma'ase.

u 0 Host LBtln Name HOlt Common name Pathogen Type

Acacia confusa Acacia Ceroospota acaciae-conrusae F

0 Ac:alypha incfiC8 Copper leaf Cen;ospora profusa F

Co//etotrichum dematium F

Ag/aonema commutafum Chinese evergreen Co/latotrichum demalium F

D C. gloeosporioides F

G/omere//a cingu/ata F

AJ/amanda cathartics Allamanda C~umg~porioides F

0 A/Humcepa Onion Co/letotrichum circinans F

Cuscuta campestiis p

A/Hum porrum leek Co//etrJtrichum circinans F

0 Phy/lostictinis sp F

A/ocasis macrontlizos False taro Diplocfl8 theobromae F

Mycosphserel/a s//ocssise F

0 Ansnss comosus Pineapple Chslara vexsns F

Fusariumsp F

Phytophthora sp F

0 Roty/enchulus renifonnis N

Annona muricata Guanaba (souraop) Pasta/otis sp F

Cephalosporium sp F

0 Phomopsis sp F

Col/etotrichum sp F

Annona squamosa Custard apple (sweetsop) G/omere//s cingu/ata F

0 Bollyodiplodls theobromae F

Anthurium sndrsesnum Anthurlum Xanthomonss campestris pv dieffenbachise B

AniJgonon leptopus Chain of love Co/latotrichum sp F

D Pesta/otissp F

Arachis hypogea Peanut Cen;ospora srschidicola F

Fusarium sp F

0 Puccinis srschid/s F

ArsHs cordata Aralia Cen;ospora srslise F

Cen;ospors barringtonia F

0 Phy/lostlctinis sp F

Arsnthers sp Orchid Fusariumsp F

Arsucaris exce/ss Norfolk Island Pine Pests/otis funerea F

a Areca catechu Betalnut Co//elotrichum scutatum F

Gsnoderma zonstum F

Phomopsis pslmicola F

Q Phytophthors pslmivora F

Trichoderma sp F

Fusariumsp F

D Artocarpus sltil/s Breadfruit Co/letrJtrichum sp F

Dothiore//a sp F

Phy/ophthors pslmivors F

D Bipolarissp F

Cephs/euros virescens p

Pingelap u

0 AtfocatpUS communis Breadfruit Curvu/aria sp F

Q

L D Host Latin Name Host Common name Pathogen Type

Co/letolrichi.Jm gloeosporioides F

D ArtocafPUS heterophyl/a Jackfruit Rhizopus artocarpi F

Barrington/a asiatica Fishkill tree Cercospora barringtonia F

Barringtonia 8Siatica FISh kill tree Cercospora barringlonia F

D Mycosphaerel/a sp F

Bauhinia variegata Orchid tree Co//etatrichum sp F

Bidens picosatica Beggarstick Enty/oma gU81Bnticum F

D Bidens pilose Guam daisy Cercospora bidens F

Co/letotrichum sp F

Uromyces bidentica F

g Cuscuta campestris p

Bixa ore/lana Anatto tree Phy/losticta bixina F

Bouganville8 glabra Bouganvillea (puti tal nobiu) Cercosporidium bouganvi/le8e F

0 Co/letotrichum sp F

Bouvardia sp BOINardia Peste/otis sp F

Brassicaceae Crucifers Fusarium oxysporum F

0 Alternaria brassicae F

PhomaRngam F

X. c. pv campestris (black rot) B

0 X. c. pv campestris (leaf scald) B

Erwinia carotovora B

Pseudomonas sp B

D Cuscuta campestris p

Ce/adium bico/or Caladium LeptosphaeruHna australis F

Phy/lachora colocasiae F

D Cuscuta campestris p

Ce/ophy/lum inophyl/um Palo maria Coccomyces sp F

Cenava/ia megalantha Jackbean Co/letotrichum gloeosporioides F

D Phy/losticta sp F

Cennasp Canna lily Puccinla thaHae F

Carica papaya Papaya Colletotrichum sp F

0 Cercospora sp F

Corynespora CBSSiico/a F

Helminthosporium papayas F

0 Fusariumsp F

Phytophthora palmivora F

Erwinia sp (bactarial necrosis) B

0 Erwinia sp (mushy canker) B

Papaya Ringspot Virus (PRV-p) v Roty/enchu/us reniformls N

D Meloidogyne sp N

Cassia fora Sicklepod Co/letotrfchum gloeosporioides F

Casuarina equisetifolia Ironwood Ganodenna austra/e F

0 Nectria haemafococca F

Catlleyasp Orchid Phyl/osticta sp F

Chromo/aena odorala Chromolaena Co/letotrfchum dematium F

0 Phomopsis sp F

D

L

D Host Latin Name Host Common name Pathogen Type

Septoriasp F

c Chrysanthemum sp Chrysanthemums (mums) Phytophfhora sp F

Citrus aurantifolia Ume Cerr;ospora citri F

Diaporlhe citri F

D Phytophthora sp F

Citrus sp Citurs Cerr;ospora citri F

Colletotrichum sp F

D Capnodium sp F

Phomopslscitri F

Septobasidium sp F

g Xanthomonas campeslris pv citri 8

Pseudomonas sp 8

Citrus Tristezs Virus (CTV) v

D Cessytha filiformis p

C/erodendron inermie Clerodendron Urec/o derodendricola F

Clerodendron sp Clerodendron Cerr:ospora vo/kameriae F

D CoUetotrichum g/oeosporioides F

Coccinia grandis Ivy gourd Papaya Ringspot Virus (PRV-w) v Cuscuta campestris p

0 Coccoloba INif&ta Seagrape Pesta/otia adusta F

Cocos nucifera Coconut Lasiodiplodia theobromae F

PesfB/otia palmarum F

Phytophthora palmivora F

Pseudoepicoccum coccos F

M818Smiellus inoderma F

0 Bac:iUus coli 8

Coconut Tinangaja Viroid (CTiVd) Vd

Codiaeum variegatum Croton Co//etotrichum gloeosporioides F

B Phyl/ostic/a cocfl8ei F

Cuscuta campestris p

Coffee arabica Coffee Ceroospora coffeico/a F

0 Co/Jetotrichum sp F

Coix /achtymajobi Job's tears Curvu/aria sp F

Colocasiaesculenta Taro(SunQ Macrophoma sp F

Q Phytophthora co/ocasiae F

Sderotium ro/fsii F

Curvu/aria sp F

0 Pythiumsp F

LBsiodip/odia theobromae F

Fusarium proflferatum F

0 Phy/Jostic/a sp F

Dasheen Mosaic Virus (DMV) v Taro Bac:ilfrform Virus (TaBV) v

0 Meloldogyne sp N

Cordyline tenninalis Tiplant Curvularialunata F

Phyl/osticta cordyllnes F

0 Coriandrum setivum Coriander (cilantro) Pythiumsp F

0

L

Host Latin Name Host Common name P&thogen Type

Crinum ssiaticum Crinum Mycosphaere/la sp F

[ Crota/aria juncea Sunnhemp Curvularia lunata F

Sclerotium rolfsii F

Stemphylium sp F

0 Cuscuta campestris p

Cucurbitaceae Cucurbits Oidiumsp F

Fuseriumsp F


G/oeosporium sp F

Glomere/la cingulata F

lseriopsis griseole F

Rhizoctonia sp F

Co/letotrichum sp F

Corynespora cessiicola F

Cercospora citrul/ina F

Pythiumsp F

Didymella bryoniee F

Acidovorax evenae subsp citru/0 8

Pseudomonas /achrymans 8

0 Erwinia cerotovora 8

Papaya Ringspot Virus (PRV-w) v Zucchini Yellow Mosaic Virus (ZYMV) v

D Cucumber Mosaic Virus (CMV) v Watermelon Mosaic Virus (WMV) v Melo/dogyne sp N

0 Cycas circina/is Cycad Colletotrichum g/oeosporioides F

Pesta/otia cycecfiS F

Cymbopogon citnitus Lemongrass Cuscuta campestris p

0 Pucclnia nakanishikii F

Cynodon dactylon Bermuda grass Rhizoctonia sp F

Dectyloctenium aegyptium Crowfoot grass Drechslere cyrodontis F

Davi/Dasp Fern Gloeosporium sp F

Delonixregia Aametree Corio/us badius F

Dendrobium sp Orchid Col/etotrichum sp F

0 Phyllosticla nigromeculans F

Phy/losticla pyriformis F

Cerebella andropogonis F

~ Fusariumsp F

Rhizoctonia sp F

Pseudocercospora dendrobii F

0 Cymbidium Mosaic Virus (CyMV) v

Dicenthefium blahdii Grass Physarumsp F

Pucclniasp F

0 Dieffenbachia picta Dieffenbachia Colletotrichum g/oeosporio/des F

Colletotrichum circinans F

Mycosphaerella sp F

0 Dioscorea alata Yam Cercospora ubi F

L

D Host Utln Name Host Common name Pathogen Type

Cladosporium sp F

Fusariumsp F

Gop/ana dioscoreae F

Rhizoctoniasp F

Prstylenchus coffeae N

Dolichos hosei Sarawak bean Colletatrichum demstium F

Dracaena fragrans Dracaena Cercospora sp F

D Entada puiSBeta Giant bean Phyllachora sp F

Erythrina variegate Coral tree Colletatrichum gloeosporioides F

Phomamusae F

Eucalyptus cinerea Eucalyptus Colletotrichum sp F

Pesta/otia troncata F

Rhizoctonia sp F

Eupatorium perfoDatum Boneset Curvu/aria sp F

Pestslotia sp F

Evolvulus mutsllanus Blue daze Rhizoctoniasp F

Ficus caries Fig CeroteDum fici F

Ficus elastica Rubber tree Colletotrlchum gloeosporloides F

Fleming/a mecrophyl/a Flemlngia Colletotrichum sp F

0 Bipolaris sp F

Hibiscus tiliaceus Sea hybiscus (pago) Phyl/achora minuts F

Agrobaclerium tumefaciens B

D Hymenoca/Ds littolalis Spider lily Curvu/aria leonensis F

Guignardia sp F

Stagonospora curtisl1 F

D Sclerotium rolfs1i F

Impatiens be/semina Impatiens Cuscuta campestris p

Ipomoea aquatics Kang kong Albugo /pomoeae F

0 Cercospora ipomoeae F

Colletotrichum sp F

Ipomoea batatas Sweet potato Rhizoctonia so/ani F

Elsinoe batatas F

Ipomoea pes-<:ap~ae Beach morning glory Albugo ipomoeae F

Cercospora ipomoeae F

0 MeRola ma/acotricha F

Cessytha filiformis p

Ipomoea trlloba Utile bell Cercospora ipomeae F

0 lxora chinensis lxora Mycosphaere//a sp F

Jasminum sambac JB811lin Mycosphaerel/a sp F

Jatropha cures Barbados nut (pysialut) Colletotrlchum gloeosporioides F

D Jatropha multifida Jatropha Colletotrlchum gloeosporioides F

Juniperus itaHca Ceder Pesta/otia funeree F

L.acluca sativa Lettuce Pseudomonas sp B

0 Lagenaria siceraria Bottle gourd (calabasa) Oidiumsp F

Lsgerstroemia indica CrapemyrUe Carcospora sp F

Cepnodlum sp F

0 Lansium domesticum Langsat (lansones) Nectrlel/a pironii F

0

u D Host Latin Name Host Common name Pathogen Type

Aphelenchoides sp N

u Lantana camatll Lantana Phyllosticts sp F

Leucaena /eucocephala Leucaena (talantangan) Oidiumsp F

Hormodendron sp F

u Peslalotia sp F

Cuscula campestris p

Loliumsp Ryegrass Helmlnthosporium turr:icum F

u Rhizoctonia sp F

Mangifera indica Mango Co/Jetotrichum dernatium F

Co/16totrichum gloeosporioides F

Q Alternaria sp F

Glomeralla cingulala F

E/sinoe mangiferae F

Penicillium sp F

Pestalotia mangiferae F

Phomasp F

u Phomopsis sp F

Phytophthora pa/mivora F

Macrophomna mangifera F

u Woody Gall Virus v Manihot esculenta Cassava (mendioka) Cercosporidium hennings11 F

Fusarium so/ani F

X. campeslris pv manihofis• 8

Momordica charantia Bitter melon (almagoso) Cercospora cilruiHna F

Oidiumsp F

D Pythiumsp F

Ascochyta sp F

PRV-w v

u ZYMV v MonsteradeHciosa Monstara (philodendron) Pseudomonas cichon7 8

Morinda citrifo/ia Indian mulberry Phy/loslicta morindae F

0 Physalospora morindae F

Muntingia caJabura Panama cherry Cercospora muntingiae F

Musa paradisiaca Banana Co/Jetolrichum musae F

0 Fusarium oxysporum-musae F

Fusarium oxysporum f sp cubense F

Mycospheera/Ja tijiensis F

0 Phomasp F

Coniana musae F

Guignardia musae F

D Marasmie/lus inoderma F

Phy/losticta sp F

Banana Bunchy Top Virus (BBTV) v

D Banana streak Virus (BSV) v Cucumber Mosaic Virus (CMV) v Meloidogyne sp N

0 Radopho/us simi/is N

~

u 0 Host Latin Name Host Common name Pathogen Type

Musasp Banana Deightonie//a sp F

0 Gloeosporium I7IUS8IUtrl F

Nigrospom sp F

Helicotylenchus sp N

Nasturtium offlcina/e Wateraess G/oeosporium sp F

Oncidiumsp Orchid CyMV v Pachyrlrizus erosus Yam bean Olcama) Phakopsora pachyrlriza F

u Pancratium /itlota/e Spider lilly Sclerotium rolfs1i F

Pan/cum maximum Guinea grass Cercospora sp F

Panicum purpurescens Para grass Pucclniasp F

~ Parldnson/a aculeats Yellow jew tree G/omere/18 cingu/aJa F

Paspalum fimbriatum Pespalum Curvulatia senegalensis F

Drechslera victoriae F

Passfflora foetida Passion fruit Ceroospora fuscovirens F

Pedi/anthus tilhymaloides Slipper flower Phomopsis sp F

Pennisetum polystscyon Elephant grass Puccln/asp F

Pen;ea americana Avocado Glomerel/a cingu/afa F

Phomopsis sp F

Sphace/oma perseae F

Cercospom sp F

Phaseolus vulgaris Bean Ascochyta phaseolorom F

Botrytis sp F

Co//etotrichum Dndemuthlanum F

Oidiumsp F

Pythiumsp F

Rhizoctonia so/ani F

TrichodeTTTI8 sp F

Uromyces phaseoli F

Macrophomina phaseoOna F

Pseudomonas phaseoOco/a B

Meloidogyne sp N

Phoenix dactyHfera Date palm Graphio/a phoenicis F

Co/Jetotrlchum sp F

Phomopsis sp F

Phyl/antus aridus lba Phakopsora phyf/anthi F

Phomopsis sp F

Phymalodes sco/opandria Fern Co/Jatotrlchum sp F

Piper guahamanse W~d piper (pupulu) Co/Jatotrlchum dematium F

Pisum sativum Garden pea Colletotrichum Ondemuthianum F

Phaeosphaeria sp F

Pisum sativum Snow pea Co/letotrichum sp F

var. macrocarpon Scute//onema sp N

Pithecel/obium dulce Guaymochll (kamachili) Colletotrlchum dematium F

Plumeria rubra Plumeria Co/Jetotrichum gloeosporioides F

Coleosporium p/umeriae F

P/umaria obtusifDriB Plumeria Co/eosporium p/umeriae F

Poinsetlia pulcherrima Poinsettia (pascua) Phytophlhora sp F

~-----------------------------------------------------------------------------------------------------------

L

Host Latin Name Host Common name Pathogen Type

PofiBllfhes tuberosa Tuberose Sclerotium rolfsli F

Po/yscias frulicosa Aralia Phyllosticta ara/iae F

Septoriasp F

Psidium guajava Guava Co//etotric:hum g/oeosporioides F

Curvularia sp F

G/omere/la cingu/ata F

Pesta/otia sp F

Phy/losticta sp F

Cephaleuros virescens p

Psophocarpus tetragono/obus Wing bean (sigidillas) Me/oidogyne sp N

Raphanus sstivus Radish Streptomyces scabies 8

Raphidophora aurea Raphidophora C~etotrir:humwoeosporioides F

Lasiodiplocfta theobromae F

Rheo d"IScolor Moses in a basket Co//etotric:hum demafium F

Co//etotric:hum gloeosporioides F

Curvu/aria sp F

Pesta/otia sp F

Phytophthora sp F

Rosasp Rose Diplocarpom rosae F

Leptosphaeria coniothyrium F

Oidiumsp F

Peronospora sparse F

Pesta/otia sp F

Agrobactarium tumefaciens 8

Roystonea regia Royal palm Co/letotric:hum sp F

Saccharum offlcinarum Sugarcane Cerr:ospora keopkei F

Co//etotric:hum falcatum F

Fusariumsp F

Scaevo/a taccada Half flower Mycosphaere/la scaevo/ae F

Cepnodium sp F

Sc:hefllera actinophy//a Scheffiera Mycosphaerel/a sp F

Phy/losticta sp F

Solanaceae Solanaceae Co//etotric:hum sp F

G/oeosporium sp F

Phomasp F

G/omere/la cingulata F

Phomopsis sp F

Macrophoma sp F



Fusariumsp F

Penici/Hum sp F

Corynespora CBSSiico/a F

Co//etotric:hum gloeosporioides F

Curvu/aria sp F

Sclerolinia sclerotiorum F

Septoria /ycopersici F

lJ

D Host Latin Name Host Common name Pathogen Type

Stemphylium sp F

D Astromel/a sp F

Cephalosporium sp F

Colletotrichum acutatum F

D Col/etotrichum capsici F

Curvu/aria lunBIB F

Diaporlha sp F

Drechslera sp F

LeptosphaeruHna argentinens/s F

Phyllosticta sp F

Cercospora capsicl F

Microsporon sp F

U/ocladium sp F

Pestalotia sp F

Rhizoctonia sp F

Ralston/a solanacearum B

X. campestris pv vesicatoria B

Erwin/a carotovora B

Meloidogyne sp N

Papaya Leaf Curl China Virus v Pohlto Virus Y (PVY) v Tobacco Mosaic Virus(TMV) v Tomato Mosaic Virus (ToMV) v CMV v

Sorghum halepense Johnson grass Puccinia purpurea F

Sorghum bico/or Sorghum Bipolaris sorghicola F

Exserohilum turoicum F

Stechytarpheta urlicaefolia False verbena Oidiumsp F

Ra/sfon/a solanacearum B


Tabebuia pentaphy/la Pink labebula Co/letotrichum demEII/um F

Co/latotrichum gloeosporioides F

Phomopsis sp F

Phylloslictasp F

T riphasia trifo(IS T~hasia Co/letotrichum g/oeosporioides F

Vandasp Orchid Fusarium so/ani F

Phytophthora pa/mivora F

0 Sclerotium rolfsii F


Veitchia merri/Hi Manila palm Mycena citrico/or F

0 Phyl/osticta sp F


V'tgna unguicu/ala Yard-long bean Co/letotrichum dematium F

subsp. sesquipedalis Colletotrichum sp F

Diaporlhe sp F

Oidiumsp F

0 Fusariumsp F

§

L

D Host Llltln Name Host Common nama Pathogen Type

G/oeosporium sp F

D Helmirtlhosporium vignae F

LeptosphaeruHna australis F

Nigrospora sp F

Pestalotiasp F

Pythiumsp F



Corynespora cassl7co/a F

Uromycas vignae F

X. campestris pv phaseoli 8

Meloidogyne sp N

We/theria indica Waltheria Cercospora melochiae F

Wedelia biflora Wedelia Uredosp F


XIUIIhosoma sagiltifolium Xanthosoma (sunin honolulu) DMV v lea mays Com Puccinia polysora F

Puccinla sorghi F

Bipolaris maydis F

Cercospora zeae-maya/S F

Erwin/a disso/vens 8

X. campestris pv holcicola 8

Maize Dwarf Mosaic Virus (MDMV) v Zephyranthes roses Zephyranthes Cercospora sp F

Colletotrichum capsici F

Phy//osticta amary/Hdicola F

Zinnia elegans Zinnia Sclerotium rolfsti F

Zingiber officina/a Ginger Co/Jetotrichum sp F

Phomasp F

Zoysia japonica Japanese grass Rhizoctonia sp F

Macroposthonia sp N

c Legend:

• Indicates eradicated spac:ln

B:bactarla

F: fungus

N: nematode

0 P: parasitic plant

U:unknown

V: virus

D Vd:vlrold

0 0 ~

D

D D

D g

0

0 D

D g

0 0 ~

D

0 D

B

References 1. Anonymous. 1978. Agreed report. UNDP/F AO-SPEC Agricultural Pests and Diseases Survey. Meeting of Coordinating Committee and Tripartite Review. SPC, Suva.

2. Farr, D. F., Bills, G. F., Chamuris, G. P and Rossman, A. Y. 1989. Fungi on plants and plant products in the United States. APS Press, St. Paul. 1252 pp.

3. Firman, I. D. 1978. Bibliography of plant pathology and myucology in the area of the South Pacific Commission. 1820-1976. SPC Tech. Paper no. 176.

4. Hodgson, R. A. J., Wall, G. C. and Randles, J. W. 1998. Specific identification of Coconut Tinangaja Viroid for differential field diagnosis ofviroids in coconut palm. Phytopathology 88: 774-781.

5. McConnell, J. and Gutierrez, L. 2006. Color atlas of common weeds of Guam. Agricultural Experiment Station, University of Guam.

6. O'Connor, B. A. 1967. Exotic plant pests and diseases. SPC, Noumea.

7. Russo, V., Beaver, G., Cruz, F. and Rubin, H. 1985. Plant pathogens and associated hosts on Guam. Technical Report. AES Publication No. 46.

8. SPC. Surveys for plant diseases caused by viruses and virus-like pathogens in the US Territory of Guam, the Commonwealth of the Northern Mariana Islands, the Republic of the Marshall Islands and Nauru. SPC Technical Paper no. 229. In Press.

9. Trujillo, E. E. 1971. A list of diseases of economic plants in the Trust Territory of the Pacific Islands. Dept. Res. Dev., Div. Agric.

10. Wall, G. C. and Cruz, F. J. 1991. Lasiodiplodia theobromae and Fusarium proliferatum causing storage rots oftaro on Guam. Pl. Dis. 75:1289.

11. Wall, G. C. 1991. Plant diseases of recent introduction to Guam. Micronesica Suppl. 3: 41-45, 1991.

12. Wall, G. C. 1989. Plant diseases reported on Guam- 1989. AES/CALS, University of Guam.

13. Wall, G. C. 2002. Microscopic aliens threatening the Pacific region. Micronesica Suppl. 6:29-33.

14. Wall, G. C., Kimmons, C. A., Wiecko, A. T., and Richardson, J. 1996. Blackeye Cowpea Mosaic Virus (BlCMV) in yard-long bean in the Mariana Islands. Micronesica 29(2): 101-111.

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D

D

0 0 D

0

15. Wall, G. C., Santos, V. M., Cruz, F. J., Nelson, D. A., and Cabrera, I. 1990. Outbreak of watermelon fruit blotch in the Mariana Islands. Plant Disease 74: 80.

16. Wall, G. C., and Santos, V. M. 1988. A new bacterial disease of watermelon in the Mariana Islands. Phytopathology 78:1605.

17. Wall, G. C., Yudin, L. S., and Quitugua, R. J. 1992. Cross-protection of papaya on Guam. PATP News, Newsletter No. 8, Pacific Association of Tropical Phytopathology.

18. Wall, G. C., Quitugua, R. J., Soriano, J., and Iriarte, I. 2004. Betel nut bud rot disease. Cooperative Extension Service, College of Natural & Applied Sciences, University of Guam.

19. Wall, G. C., Custer, D. M., Ullman, D. E., Westcot, D. M., Yudin, L. S. and Cho, J. J. 2006. Indirect immunoblot technique for surveying cucurbit viruses in the Pacific Basin: II. Survey. CNAS Research Conference, University of Guam, October 23, 2006.

20. Yudin, L. S., Wall, G. C., Johnson, M. W., Cho, J. J., and Quitugua, R. J. 1990. Identification of virus diseases occurring in cucurbit crops on Guam. Phytopathology 80:1063.

plant diseases reported on the island of guam d · davi/dasp fern gloeosporium sp f delonixregia...

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