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Table 11 Percent control of fungal growth on wood blocks dipped in sodiumazide solution for 10, 20 and 30 minutes.Period of incubation (weeks)Dipping time Concentration 1st 2nd 3rd 4th(minutes) %10 0.1 100 100 80 400.25 100 100 100 480.5 100 100 100 60control 0 0 0 0200.1 100 100 70 600.25 100 80 80 800.5 100 100 100 92control 0 0 0 030 0.1 100 100 72 600.25 100 100 100 800.5 100 100 100 100control 0 0 0 0Biological control(a) Testing of the bacterium on culture mediumThe bacterium, Bucilliis subtilis inhibited the growth of all fungi testedexcept Pythium sp. (Table 12). The maximum inhibitory zone was noted in thecase of B. theobromae (Figs. 7, 8) followed by Memnoniella echinata, Scytalidiumlignicola, Trichoderttia viride, Acremonium recefei, Aspergillus niger, A. flavus andCerutocystis fimbriata Among the pathogens tested, Pestulotiopsis sp., the commonfoliar pathogen had shown the inhibitory zone upto 17 mm.Testing of the bacterium on wood blocksThe wood blocks of three timber species, Hevea brasiliensis, Ailanthus triphysAand Alstonia scholaris treated with the suspension of B. subtilis were found to bedevoid of any fungal growth (Figs. 9,l0). On the control blocks the fungus grewwell and covered the entire surface of wood and also resulted in internal stain.
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Page 4 and 5: INTRODUCTIONFungi cause different k
Page 6 and 7: MATERIALS AND METHODSSurveyA prelim
Page 8 and 9: Table 1 Relative humidities over sa
Page 10 and 11: Optimum moisture content of wood fo
Page 13 and 14: Treatment 1 : Dipping and stacking
Page 15: Ceratocystis fimbriata was prominen
Page 18 and 19: Table 5Percentage of weight loss du
Page 20 and 21: Table 7Growth rating of B.theobroma
Page 22 and 23: y the boron diffusion process and f
Page 26 and 27: -Table 12 Inhibitory zone (in mm) p
Page 28 and 29: CONCLUSIONS1. Botryodiplodia theobr
Page 30 and 31: Colley, R. H. and Rumbold, C. T. 19
Page 32: Verrall, A. F. 1941. Fungi associat

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