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Abstract

Najjar' H. 1985. A review ofmeans ofinfection of Botrytisrot in grapes. Arab J. Pl. Prot. 3: ll2 - 116

Proper timing for treatment of Botrytis rot of grapes isclosely related to periods of infection. Conidia are producedby overwintering sclerotia and seem to grow best at relativehumidity above 90% and temperatures of L5 - 20 degrees C.Infection takes place mainly in spring when grapes are inflower, and flower parts are the main site for infection.Stamens die and some remain attached to the bunches andform a later source of infection. Stigmas, however, are themain entrance. Here the conidial tube grows down the styleto reach an abscission layer near the ovary which it cannot

penetrate. So it remains in a state of latency until time ofveraison. At this period the Latent mvcelia grow andsomehow penetrate the said layer and cause the known grayrot. Conidia are abundant at veraison and at full ripening ofthe grapes. Further treatment is needed at these periods. Onmature grapes mycelia can easily pass from a diseased grapeto adjacent healthy ones and thus spread the disease.Suggestions are given for research on various phase oftreatment in early spring.

References

1. Albertini, L., N. Khamoeum and A. Aziz. 1980.Research on the biotogical control of Botrytis cinereaPers., a grapevine parasite. In vitro action of fungusantagonists on the sclerotium formation and on theconidium and sclerotium germination of the parasite.pp. 65 - 68. In: Proceedings of the Vth Congress of theMediterranean Phytopathological Union. patras,

Greece.

2. Bernard, A.C.and J.P. Dallas. 1981.Observation sur lenombre de stomates de baies de vari6t6s de Virt.s

vinifera L.; Relation avec le comportement d l'6gardde la pourriture grise ( Bottytis cinerea pers.).

Phytoma: 15 May, pp.230 - 232.

3. Bisiach, M., F. Zerboro and G. Minervini. 1980.Ricerche ulla conservazione invernale di Botrytiscinerea su vite Societa Italiana di Fitoiatria. pp.

L3 - 33.In: Proceeding of Atti d,ell Incontro su: la muffagrigia della vite. Pavia, Italy.

cilltFalcini,L.and M. Marro. 1982. ln proceeding of theThird International Symposium on Clonal Selection inVines. Consiglio Nationale delle Richerche. pp.310 - 326. Roma, Italy.

Gane,B.S.,S. Lafon, Lafourage and B. Dubos. 1982.Incidence oenologique du traitement biologique de lavigne par Trichoderma viridis itl'6gard de la pourrituregrise. Connaissance de la Vigne et du Vin. 16: 78 - 95.

Gartel,B. 1976.Les probldmes pos6s par la pourrituregrise sur la vigne, comment les r6soudre. progrds

Agricote et Viticole. 94:294 - 311.

Hunter, T.H. and L.A. Whiteley, 197g. Fungicidalcontrol of Botrytis cinerea on grapevines in England.Plant Pathology.2T:81 - 85.

McClellan, W.D. and W.B.Hewitt.1973. Early Botrytisrot of grapes: time of infection and latency ol Botrytis

cinerea.Pers. in Vitis vinifera. phytopathotogy. 63:1151 - 1157.

5.

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8.

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12.

13.

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9.

10.

11.

McClellan, W.D., W.B. Hewill, P. La Vine and J.

Kissler. 1973. Early Botrytis rot of grapes and itscontrol. American Journal of Enology.24:27 .

Nelson, K.E. 1951.Factors influencing the infection oftable grapes by Botrytis cinereaPers. Phytopathology.

4l:319 - 326.

Nelson,K.E. 1951. Effect of humidity on infection oftable grapes by Botrytis cinera. Phytopathology. 4t859 - 864.

Scilva, J. 1980. Botrytis research with White Burgundy

grapes. Obstbaw Weinbau. t7: 206 - 207. Abstracted inReview of Plant Pathology (6578) Vol 60, 1981.

Vercesi, A.and M. Bisiach.1982. Investigations on the

fluctuation of Botrytis cinerea Pers., inoculum

potential in a vineyard. Revista di Patologia Vegetale.

18: 13 - 48.

Compte Rendu du Symposium International consacr6 d

la Pourriture grise de la vigne(Bottytis cinerea Pers.).

1981. Progr6s Agricole et Viticole. 98: 208.

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