| Summary: | Hevea is one of the important commodities in Indonesia, because other
than as the source of state revenue is also a livelihood for more than 12 million
residents, as well as commodities that can assist the development of remote areas.
White root disease caused by the Rigidoporus microporus is kind of a disease that
are harmful for hevea plantation. aims this study is to determine inhibition of
Trichoderma harzianum against the white root and the use of T. harzianum in
suppressing the emergence of white root disease in the nurseries. The research
conducted in laboratory of Agricultural Micology with testing the antagonistic
nature of T. harzianum and mikoparsitisme test against the R. microporus.
Results of laboratory studies showed that the diameter of the fungus
R. microporus on day 7 without fungus T. harzianum greater 2.91 cm compared in
diameter R. microporus with fungus T. harzianum 2.70 cm by percentage
inhibition 7.21%. On the of test mikoparasitisme hifa of T. harzianum wrapped
around hifa R. microporus so the growth is hampered. The research results of
screen house obtained percentage who of symptomatic plants due to disease
attack of white root in consist of : P01: 0.00%, P02: 16,68 %, P1: 17,34 %, P2:
18,72 %, P3: 10,70 %, P4: 5,71 % with the average of 11,52 %. Smallest
percentage of obtained are of treatment P01 (water): 0.00%, and the largest of
obtained on treatment P2 (5 g T. harzianum / polibag) : 18,72 %, while the
intensity of the white root disease at each treatment P01: 0.00%, P02: 0,53 %, P1:
0,59 %, P2: 0,62 %, P3: 0,46 %, P4: 0,26 % with the average of 0,41 %. Smallest
percentage of obtained are of treatment P01 (water): 0.00%, and the largest of
obtained on treatment P2 (10 g T. harzianum / polibag) : 1,78%. Mechanisms
controllingT. harzianum against R. microporus form of competition in the use of
nutrition and mycoparasitism.Hevea is one of the important commodities in Indonesia, because other
than as the source of state revenue is also a livelihood for more than 12 million
residents, as well as commodities that can assist the development of remote areas.
White root disease caused by the Rigidoporus microporus is kind of a disease that
are harmful for hevea plantation. aims this study is to determine inhibition of
Trichoderma harzianum against the white root and the use of T. harzianum in
suppressing the emergence of white root disease in the nurseries. The research
conducted in laboratory of Agricultural Micology with testing the antagonistic
nature of T. harzianum and mikoparsitisme test against the R. microporus.
Results of laboratory studies showed that the diameter of the fungus
R. microporus on day 7 without fungus T. harzianum greater 2.91 cm compared in
diameter R. microporus with fungus T. harzianum 2.70 cm by percentage
inhibition 7.21%. On the of test mikoparasitisme hifa of T. harzianum wrapped
around hifa R. microporus so the growth is hampered. The research results of
screen house obtained percentage who of symptomatic plants due to disease
attack of white root in consist of : P01: 0.00%, P02: 16,68 %, P1: 17,34 %, P2:
18,72 %, P3: 10,70 %, P4: 5,71 % with the average of 11,52 %. Smallest
percentage of obtained are of treatment P01 (water): 0.00%, and the largest of
obtained on treatment P2 (5 g T. harzianum / polibag) : 18,72 %, while the
intensity of the white root disease at each treatment P01: 0.00%, P02: 0,53 %, P1:
0,59 %, P2: 0,62 %, P3: 0,46 %, P4: 0,26 % with the average of 0,41 %. Smallest
percentage of obtained are of treatment P01 (water): 0.00%, and the largest of
obtained on treatment P2 (10 g T. harzianum / polibag) : 1,78%. Mechanisms
controllingT. harzianum against R. microporus form of competition in the use of
nutrition and mycoparasitism.
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