VOLUM OMAGIAL - Facultatea de Ştiinţe ale Naturii şi Ştiinţe Agricole

Marioara Trandafirescu et al. / Ovidius University Annals, Biology-Ecology Series 14: 55-59 (2010)
Table 1. Behaviour of some cultivars roses to the
attack of the main pathogens agents
CULTIVARS Diplocarpon Sphaerotheca Phragmidium
rosae pannosa var. rosae mucronatum
G.A. Resistan G.A. Resistan G.A. Resistan
(%) -ce class (%) -ce class (%) -ce class
Brocade 7.2 S.A. 11.6 M.R. 12.3 M.R.
Grand premiere 0 R 0 R 4.6 S.A.
Creole 12.4 S.A. 6.5 S.A. 3.2 S.A.
Traviata 0 R 1.2 R 14.6 M.R.
Grand prix 32.4 S 0 R 0 R
Horido 47.3 F.S. 1.0 R 3.6 R
Apogee 0 R 0.8 R 0 R
Luchian 0 R 4.2 S.A. 3.6 S.A.
First love 1.2 R 17.6 M.R. 38.4 F.S.
Concerto 3.7 R 9.7 S.A. 12.2 S.A.
Konigin der
Rosen
63.0 F.S. 14.2 M.R. 0 R
Foc de tabără 4.1 R 1.6 R 1 R
Miss Univers 26.3 S 0 R 0 R
Chicago Peace 32.0 S 37.6 F.S. 22.8 S
Kronenburg 34.6 S 17.6 M.R. 0 R
Bel Ange 4.3 S.A. 0 R 0 R
Cocotte 0 R 0 R 18.3 M.R.
Samurai 1.6 R 3.6 R 4.3 R
Monica 0 R 0 R 0 R
Montezuma 17.4 M.R. 9.6 S.A. 4.5 S.A.
Don Juan 3.6 R 0 R 0 R
Grand Mogol 15.0 M.R. 2.0 R 42.6 F.S.
Sutter’s Gold 11.7 S 42.6 F.S. 53.2 F.S.
Effel Tour 0 R 3.6 S.A. 1.2 R
Detroit 37.9 F.S. 6.4 S.A. 0 R
Maria Callas 15.6 M.R. 0 R 1.2 R
Simfonia albă 24.0 S 0 R 1.2 R
Mabella 57.0 F.S. 10.2 M.R. 13.7 M.R.
Pascali 12.2 S.A. 0 R 0.9 R
Rumba 19.3 M.R. 6.9 S.A. 22.0 M.R.
King’s Ranson 0 R 1.2 R 54.6 F.S.
Baccara 6.3 S.A. 22.0 S 7.2 S.A.
Superstar 1.2 R 3.6 R 12.6 M.R.
Kordes Perfecta 51.2 F.S. 17.9 M.R. 21.3 M.R.
Madame
Meilland
0.7 R 7.3 S.A. 4.6 S.A.
Coup Foudre 0 R 12.6 M.R. 17.2 M.R.
Mr. Lincoln 2.6 R 0 R 0 R
Dame de Coeur 7.2 S.A. 12.6 M.R. 42.1 F.S.
Rose Gaujard 42.6 F.S. 51.8 F.S. 22.4 M.R.
Carina 12.4 S.A. 6.3 S.A. 1.2 R
Queen Elisabeth 3.2 R 1.2 R 0 R
Eminance 1.2 R 2.6 R 0 R
Mainzer
Fastnacht
38.6 F.S 7.9 S.A. 9.6 S.A.
Karla 13.0 M.R. 1.6 R 2.0 R
Flamenco 19.3 M.R. 3.6 R 12.3 S.A.
Ingrid Bergman 7.2 S.A. 14.6 M.R. 1.2 R
Ambassador 1.2 R 6.2 S.A. 1.6 R
Emerande d’or 0.6 R 38.6 F.S. 0 R
Parfum 0 R 1.8 R 2.6 R
Rubin 0 R 0 R 0 R
57
Fig. 2. Făinarea trandafirului – Sphaerotheca
pannosa var. rosae
Afterwards, the attack progressed covering
almost entirely the leaves, which turn in yellow, then
dried and fallen down. In this case the attack
progressed also on the young floral buds of the
sensible cultivars, which were covered by the
mycelium felt and they could not open.
Assessment of the data presented in the same
table revel that, a high (natural) resistance to this
damaging pathogen stroke manifested the cultivars:
Grand Prix, Miss Univers, Maria Callas, Pascali,
Simfonia albă, their vegetative organs were entirely
clear from Sphaerotheca pannosa var rosae. fungi
symptoms.
At the other pole were the cultivars: Emerande
d’or, Chicago Peace, Sutter’s Gold and Rose Gaujard
which were rated as very sensible (V.S.), but they can
be used as sensibility indicators.
The attack produced by Phragmidium
mucronatum fungi, was noticed at the end of the first
decade of May and progressed until the last decade of
September. In this month this pathogen attack
frequency (F%) and the intensity (I notes) registered
the highest values.
From the beginning the disease progressed on
all plants organs: leaves, young branches, stalks and
floral buds (Fig. 3). On these organs was noticed the
presence of some orange pustules representing the
fungus ecidia.