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Cucurbit Genetics Cooperative Report 2:44-45 (article 27) 1979

Disease Resistances in Some Wild Cucumis Species

M. Pitrat and R. D. de Vaulx

Station d'Amélioration des Plantes Maraîcherès, I.N.R.A., Domaine Saint Maurice, 84140 Montfavet-Avignon, France

Cucumis species in collection at the Vegetable Plant Breeding Station of Montfavet-Avignon (France) were evaluated for resistance to natural infestation or artificial inoculation to some important diseases in France: cucumber mosaic virus (CMV), watermelon mosaic virus (WMV-2), powdery mildew, corky-root (Pyrenochaeta spp.) and root-knot nematode.

All the species tested were susceptible to CMV and WMV-2 but with different intensity levels (Table 1). In artificial inoculation, C. zeyheri was the least susceptible, i.e., mild symptoms and recovery. In natural infestation, C. zeyheri, C. prophetarum: and C. ficifolius (PI 196844) were the least susceptible.

All the species except C. anguria and C. myriocarpus were powdery mildew resistant. C. prophetarum and C. zeyheri were resistant to corky-root. C. metuliferus from Fassuliotis was also resistant to nematode (Meloidogyne incognita) in our conditions.

Table 1. Results of six disease screening tests on various Cucumis species.

 

Artificial inoculation

Natural infestation

Transplantation into infested greenhouse

 

Accession

CMV

WMV-2

CMV + WMV-2

Powdery mildew

Corky root

Root-knot nematode

C. anguria (= PI 196477)

MS

VS

S

S

S

-

C. dipsaceus (from Ethiopia)

-

-

S

R

S

-

C. heptadactylus (PI 282446)

S

MS

-

-

-

-

C. metuliferus (from Fassuliotis)

MS

VS

S

R

S

R

(from N.I. Vavilov Institute)

MS

VS

S

R

-

-

C. myriocarpus (1096)

-

-

MS

S

S

-

C. prophetarum (PI 193967)

S

S

MS

R

R

MS

C. zeyheri PI 273192

MS

MSr

R-MS

R

R

-

PI 299570

MS

MSr

R-MS

R

R

-

PI 299572

MS

MSr

R-MS

R

R

-

C. ficifolius PI 196844

MSr

VS

MS

R

S

-

PI 203915

VS

VS

S

R

S

-

PI 293646

VS

VS

S

R

-

-

R = resistant, MSr = mild symptoms and recovery, MS = mild symptoms, S = susceptible, VS = very susceptible, - = not tested.

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Page citation: Wehner, T.C., Cucurbit Genetics Cooperative;
Created by T.C. Wehner and T. Ng, 1 June 2005; design by C.T. Glenn;
send questions to T.C. Wehner; last revised on 23 October, 2009