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LUCRĂRI ŞTIINŢIFICE Vol. 54 NR. 2 SERIA HORTICULTURĂ

LUCRĂRI ŞTIINŢIFICE Vol. 54 NR. 2 SERIA HORTICULTURĂ

LUCRĂRI ŞTIINŢIFICE Vol. 54 NR. 2 SERIA HORTICULTURĂ

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MATERIAL AND METHOD<br />

The biological material studied was represented by the Angeleno and<br />

President plum varieties grown in SC Terra Viva LLC Bals.<br />

The results regarding the spreading and evolution of the main pathogens of plum<br />

culture were recorded in the climatic conditions of the years 2007 - 2009 (table 1).<br />

The estimation of the attack made by the reported pathogens was carried out<br />

accordingly to the methodologies used in Forecasting and Warning Stations. Thus,<br />

frequency (F%), intensity (I%) was established for each pathogen and the (GA%)<br />

degree of attack was calculated, the collected data being processed by the usual<br />

formulas (Săvescu A., Rafailă C., 1978).<br />

Collecting of data on pathogens attack of plum culture in SC Viva Terra LLC<br />

Bals was carried out through surveys, which means the act of observing, counting and<br />

analysis of target organs.<br />

RESULTS AND DISCUSSIONS<br />

Alongside temperature, precipitations and relative air humidity are factors<br />

whose action directly impacts the dynamics and performance of pathogen<br />

infections (Gheorghieş C., Geamăn I., 2003).<br />

Thus, analyzing the evolution of the main pathogens causing damage in<br />

plum plantation in SC Terra Viva LLC Bals, in the climatic conditions of the<br />

years 2007 - 2009 the following has been established:<br />

Table 1<br />

Climatic elements from the plum growing season, influencing pathogens’ attack in<br />

S.C. Terra Viva LLC Bals during 2007 -2009<br />

March April May June<br />

Year<br />

T 0 C<br />

P<br />

mm<br />

U<br />

%<br />

T 0 C<br />

P<br />

mm<br />

U<br />

%<br />

T 0 C<br />

P<br />

mm<br />

U<br />

%<br />

T 0 C<br />

P<br />

mm<br />

U<br />

%<br />

2007 9,6 49,0 63,5 13,1 2,0 60,2 17,1 97,7 59,6 25,9 14,4 61,2<br />

2008 10,8 17,2 62,7 16,9 73,8 65,1 22,7 37,6 67,5 24,9 65,8 66,3<br />

2009 8,6 52,4 64,7 11,9 13,8 62,7 17,4 28,6 63,7 21,4 170,4 60,0<br />

July August September<br />

October<br />

Year<br />

T 0 C<br />

P<br />

mm<br />

U<br />

%<br />

T 0 C<br />

P<br />

mm<br />

U<br />

%<br />

T 0 C<br />

P<br />

mm<br />

U<br />

%<br />

T 0 C<br />

P<br />

mm<br />

U<br />

%<br />

2007 26,5 10,8 56,5 24,5 178,2 62,7 17,3 27,6 66,1 13,7 130,2 68,3<br />

2008 25,9 91,2 64,5 25,5 0 61,8 19,7 74,8 64,5 13,8 70,2 74,3<br />

2009 23,9 112,8 66,3 25,1 2,6 65,5 22,5 21,8 64,9 13,9 126,0 73,4<br />

For the Monilinia laxa pathogen, which spreads through conidia, which<br />

germinate and produce infections within wide temperature range (0 to 25 0 C) and<br />

frequent precipitations (Tomşa M., Tomşa Elena, 2003), the Agro Expert System of<br />

Olt Phytosanitary Unit has advised the application of some treatments at different<br />

times in relation to climatic changes.<br />

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