LUCRĂRI ŞTIINŢIFICE Vol. 54 NR. 2 SERIA HORTICULTURĂ

In the year 2007, the first treatment was advised on March the 15 th when
the trees were in green button phenological stage and when, as a result of the
rainfall, the conditions have become favourable for the attack.
Treatment two was advised on the 22 nd March, when the plum was in the
phenological stage of "white button" - the opening of the first flowers.
Treatment three was advised on April the 5 th , when 15 - 20% flowers had
fallen petals.
In the subsequent phenophases, of fruit formation, another treatment was
advised, as a result of May rainfalls. In this year’s plum crop in S.C. Terra Viva
LLC Bals, there was a weak pathogen attack (table 2). In the year 2008, the
conditions for the installing of primary infections were recorded on the 14 th of
March, the environmental conditions being similar to those recorded in 2007. For
the second treatment, the Agro Expert station has warned about the presence of
favourable conditions on the 21 st of March, thus recommending the
implementation of this treatment at 7 days after the first one.
When 15-20% of the flowers had fallen petals namely on the 8 th of April,
the third treatment was advised, in the fruit formation phenophase as a result of
low rainfall no other treatment has been advised, the year 2008 being a dry year,
unfavourable for the attack of the Monilinia laxa fungus. The attack recorded this
year was a weak one (table 2).
In the climatic conditions of the 2009 spring, the first treatment was
advised in SC Terra Viva LLC Bals on 31 st of March in order to fight the
Monilinia laxa pathogen, recommending the treatment to be carried out in 2-3
days. Treatment two was advised in the phenological stage of "white button" that
corresponded to the date of April the 6 th . Treatment three was warned on April the
13 th , when the flowers had shaken petals on a ratio of 15-20%.
This year, due to the small amounts of precipitation fallen in spring
months, the attack produced by the Monilinia laxa fungus can be placed in the
category of a weak attack (table 2).
Table 2
Dynamics of the attack produced by Monilinia laxa in plum culture of SC
Terra Viva LLC Bals, in the period 2007 – 2009
Year F% I% GA% % Differences Significance
2007 40,5 12,2 4,9 144,1 1,5 xx
2008 34,8 10,6 3,7 108,8 0,3
2009 20,3 8,4 1,7 50 -1,7 00
Average / 3
years
DL 5% = 0,1
DL 1% = 1,2
DL 0,1 = 2,4
31,8 10,4 3,4 100 - -
As seen from the data given in table 2, regarding the attack of the Monilinia
laxa fungus, the latter has recorded values oscillating between 1,7% in 2009 and
respectively 4,9% in 2007.
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