Studies on soil fungistasis: Effect of certain ... - DSpace@NEHU

358 R. R. MISHRA AND K. K. PANDEY
TABLE 1
Effect of soil sterilization (in hot air oven) on fungistasis
Temp. Test fungi Mycopopulation
(~ RN AF PO VA CL HS FO (cols./plate)
caj~nus c~jan
40 74 83 82 54 32 33 52 57
50 66 72 71 38 26 28 28 39
60 58 59 61 23 12 13 12 27
70 43 48 50 16 7 1 4 12
80 33 36 41 0 0 0 0 2
100 24 35 28 0 0 0 0 0
120 26 30 27 0 0 0 0 0
Lathyrus sativus
40 77 86 82 67 38 35 54 104
50 70 79 76 43 26 29 36 62
60 59 62 66 26 9 11 13 36
70 37 45 57 10 2 2 6 11
80 26 37 44 0 0 0 0 3
100 25 33 28 0 0 0 0 0
120 23 32 28 0 0 0 0 0
Control
26 31 28 0 0 0 0
RN ~ Rhizopus nigricans, AF = Aspergillus ]lavus, PO = Penicillium oxalicum, VA
VerticilIium albo-atrum, CL = Curvularia lunata, HS = Helminthosporium sativum,
FO = Fusarium oxysporum.
TABLE 2
Effects of steam sterilization of soil on fungistasis
Time of
sterilization
Test fungi Mycopopulation
in mts RN* AF PO VA CL HS FO (cols./plate)
Cajanus cajan
5 64 69 62 45 31 36 37 45
10 39 46 41 13 5 3 9 17
15 23 30 29 0 0 0 0 0
20 24 26 31 0 0 0 0 0
Lathyrus sativus
Control
S 69 78 71 55 31 38 48 59
10 42 44 40 34 3 6 13 34
1S 24 32 31 0 0 0 0 0
20 13 31 29 0 0 0 0 0
25 30 28 0 0 0 0 0
* see Table 1