TY  - BOOK
AU  - Blessy Jose 
AU  - Lulu Das (Guide)
TI  - Integrated Management of Sheath Rot of Rice (Oryza Sativa )
U1  - 632.3 
PY  - 1997///
CY  - Vellayani
PB  - Department of Plant Pathology, College of Agriculture 
N2  - Sheath rot disease of rice, caused by Sarocladium 
oryzae Gams and Hawksworth, is one of the most important 
diseases of rice in Kerala. The present investigation was to 
work out an efficient ecofriendly integrated control measure 
utilising biocontrol agents and plant products in combination 
with the minimum dose of fungicides against this disease. 
The antagonists found effective against Sarocladium 
oryzae are Trichoderma sp., Aspergillus sp. and Penicillium sp. 
Among these, Trichoderma sp. was found to decrease the disease 
intensity and increase the yield, the most. 
 

 
tried, 
best. 
 

Among the various methods of application of antagonists 
seed treatment and root dip method were found to be the 
 

 


 

In the pot culture trial conducted to find out the mode 
of action of antagonists under various systems of application, 
none of the treatments proved superior to others. 
Leaf extract of Ocimum sanctum (10 per cent) had 
maximum inhibition of the radial growth of the fungus. Minimum 
dry weight was seen with the bulb extract (10 per cent) of Allium 
sativum and extract (10 per cent) of Ocimum sanctum. 
 
	
Carbendazim at 0.025 per cent concentration brought about 
100 per cent inhibition of radial growth and mycelial weight of 
S. oryzae. Total inhibition of radial growth of the fun~u9 WBB 
achieved by the application of 0.25 per cent Ediphenphos and 
total inhibition of the mycelial growth was achieved by the 
application of Ediphenphos at 0.075 per cent concentration. 
For mass multiplication of antagonists, bits of jack 
seeds proved to be the best substrate for Trichoderma ap. as 
evidenced by fungal growth. Tapioca rind and wheat grains was 
the best suited Aspergillus ap. Wheat bran:sand (1:10 w/w) proved 
to be the best medium for Penicillium sp. For Pestalotiopsis Sp., 
wheat bran: sand mixture at a proportion of 1:3 and 1:10 were 
found equally good. 
The integrated management practices revealed that none 
of the treatments were superior over others when yield and 
disease intensity were considered. However, least disease 
intensity was noticed with the application of Trichoderma sp. as 
seed treatment, followed by foliar spray of Ediphenphos and leaf 
extract (10 per cent) of Ocimum sanctum. Highest yield was 
obtained in the treatment combination of Trichoderma sp, applied 
as seed treatment followed by the foliar application of 
Carbendazim and the bulb extract (10 per cent) of Allium 
sativum. 
 




UR  - http://krishikosh.egranth.ac.in/handle/1/5810150660
ER  -