International Congress BIOLOGICAL PRODUCTS - Gruppo di ...

Temperature (°C) Relative Umidity (%)
100
90
80
70
60
50
40
30
20
10
0
Fig. 3 reports the assessment related to the degree of infection found on the leaves. On the fruits the first
symptoms appeared on 11 May; results on the degree of protection offered by different products are reported in
table 3. During the trial, the climatic conditions have turned out favourable for the development of pathogen
(Fig. 4). Elevate infection degrees, found on the leaves and the fruits, caused low yields.
INFECT LEAF INDEX (%)
50
45
40
35
30
25
20
15
10
5
0
Fig. 3 - Percentage of leaf damage at different date for various products
CC
a
a
a
CU
a
LEGENDA: = infections of apple scab
RG= Bud burst OT= Mouse-ear stage MA= Appearance of flower buds BR= Pink bud PF= Full flowering
CP= Petal fall AL=Fruit setting FN= Walnut fruit IF= Fruit swelling
108
a
a
b
a
a
b
IR
a
b
a
b
a
a
CV
THESES
Different letters indicate significant different value by Duncan test for P=0,05
a
a
b
c
d
c
a
PS
c
d
b
c
b
c
a
M+S
b
c
d
c
c
d
b
TEST
d d d
e
c
18/05/00
12/04/00
16/08/00
20/07/00
20/06/00
DATE
OF ASSESSMENT
Fig. 4 -Climate during the trial: directions about phenologycal phases and about infections of apple scab
Infections:
March April May June
JuLy Phenologic
phases: RG OT MA BR PF CP AL FN IF
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LEGEND
CC = Copper
oxicloride
CU = Copper
oxicloride, Copper
sulphate hydrate
IR = Copper hydroxide
CV = Copper metal
with B, Mo, Zn
PS = Calcium
polysulphide
M+S = Sulphureous
clay, leavening
substances,
equisetum extracts
TEST = Control
Rain
30
25
20
15
10
5
0
Rain (mm)
Mean temperature
Mean relative humidity