Management of virus diseases of squash in Lebanon [Cucurbita pepo L.]

Virus diseases are the major cause of economic losses in commercial cucurbit production in Lebanon. Field tests showed that cross-protection with a mild strain of Zucchini yellow mosaic virus (ZYMV-WK) gave significant protection of squash plants against severe mosaic and leaf deformation symptoms i...

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Bibliographic Details
Published in:Journal of plant pathology 2001-03, Vol.83 (1), p.21-25
Main Authors: El-Zammar, S, Abou-Jawdah, Y, Sobh, H. (American Univ. of Beirut (Lebanon))
Format: Article
Language:English
Subjects:
ABRI PLASTIQUE
BIOLOGICAL CONTROL
COBERTURA SECA
CONTROL BIOLOGICO
CONTROLLO BIOLOGICO
COPERTURE CON FILM PLASTICO
CROP YIELD
CUBIERTAS DE PLASTICO
CUCURBITA PEPO
DRY MULCHES
ELISA
ESPERIMENTI IN LABORATORIO
EXPERIMENTACION EN CAMPO
EXPERIMENTACION EN LABORATORIO
EXPERIMENTAL INFECTION
EXPERIMENTATION AU CHAMP
EXPERIMENTATION EN LABORATOIRE
FIELD EXPERIMENTATION
IDENTIFICACION
IDENTIFICATION
IDENTIFICAZIONE
INFECCION EXPERIMENTAL
INFECTION EXPERIMENTALE
Infections
INFEZIONE SPERIMENTALE
LABORATORY EXPERIMENTATION
LEBANON
LIBAN
LIBANO
LUTTE BIOLOGIQUE
Mosaic
Mosaic viruses
MULCH SEC
Mulches
PACCIAMATURA SECCA
PATHOGENICITY
PATOGENICIDAD
PATOGENICITA
PCR
Phytopathology
Plant diseases
PLANT VIRUSES
Plants
PLASTIC FILM COVERS
POUVOIR PATHOGENE
RENDEMENT DES CULTURES
RENDIMIENTO DE CULTIVOS
RESA DELLE COLTURE
SINTOMAS
SINTOMI
SPERIMENTAZIONI IN CAMPO
Squashes
SYMPTOME
SYMPTOMS
TEST ELISA
Viral diseases
VIRUS DE LAS PLANTAS
VIRUS DELLE PIANTE
VIRUS DES VEGETAUX
Viruses
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Summary:Virus diseases are the major cause of economic losses in commercial cucurbit production in Lebanon. Field tests showed that cross-protection with a mild strain of Zucchini yellow mosaic virus (ZYMV-WK) gave significant protection of squash plants against severe mosaic and leaf deformation symptoms induced by viruses and resulted in significant yield increase as compared to the control. The use of grey mulch gave only a low level of protection against such diseases. The highest total yield was obtained with floating row covers that gave good early protection against severe mosaic and leaf deformation symptoms and against the yellowing diseases. Plants showing yellowing symptoms were found to be infected by Cucurbit aphid-borne yellows virus (CABYV) or CABYV and Cucurbit yellow stunting disorder virus (CYSDV) in mixed infections [Le malattie da virus sono la causa principale di perdite economiche nella produzione commerciale di cucurbitacee in Libano. Prove di campo hanno dimostrato che la protezione incrociata con un ceppo ipovirulento del Virus del mosaico giallo delle zucchine (ZYMV-WK) conferiva una protezione significativa alle piante di zucca nei confronti di sintomi gravi di mosaico e di deformazione delle foglie indotti da virus e si traduceva in un incremento significativo della resa produttiva rispetto al controllo. L'impiego di pacciamature grigie forniva solo un livello basso di protezione contro tali malattie. La resa totale massima e' stata ottenuta con coperture mobili delle file che davano una buona protezione precoce contro i sintomi gravi di mosaico e deformazione fogliare e gli ingiallimenti. Si e' rilevato che le piante presentanti sintomi di ingiallimento erano infettate dal Virus dell'ingiallimento delle cucurbitacee trasmesso dagli afidi (CABYV) o dal CABYV e dal Virus del nanismo giallo delle cucurbitacee (CYSDV) in infezioni miste]
ISSN:1125-4653
2239-7264