hotwater treatment
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8/6/2019 Hotwater Treatment
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S R A - L G A R E C
U P D A T E S Published by the SRA-La Granja Agricultural Research and Extension Center La Granja, La Carlota City
Negros Occidental, Philippines ? (034) 735-0132 Fax(0973)222-810 e-mail: [email protected]
Vol. 5 No 1
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HOTWATER: An Effective Control for
Sugarcane DiseasesHotwater treatment is a physical method of
controlling sugarcane diseases with the use of hotwater at
certain temperature for a certain period of time. It is
effective against smut, downy mildew, pineapple disease
and ratoon stunting disease of sugarcane. It is a common
practice in sugarcane farming of developed countries likeAustralia, Japan and the United States.
DiseaseReqrd.
Temp.
Reqrd.
Time
Ratoon Stunting Disease
Leaf Scald Disease
Downy Mildew
Smut
Pineapple Disease
Chlorotic streak
50oC
50oC
52oC
52oC
50oC
52oC
2 to 3 hours
2 to 3 hours
30 minutes
18 minutes
20 minutes
20 minutes
How to do it?? Canepoints must be placed in basket of hotwater
tank
?? Basket with canepoints must be immersed in
hotwater at 50oC for 2 to 3 hours
?? Hotwater treated canepoints must be allowed to cool
for 30 minutes.
?? Then brought to the field for planting.
Advantages
?? Control of diseases like smut, downy mildew, red rot,
pineapple disease and ratoon stunting disease
?? Enhance germination
?? Increase production
Points to consider
?? Requires technical expertise in monitoring hotwater
treated plants to maintain disease free planting
material.
?? All implements (eg. disc plow ) used in the area
should be disinfected with 10 to 15% lysol solution.
?? Tools for cutting canepoints and for harvesting should
likewise be disinfected before using.
Hotwater is advisable in establishing HYVs
nurseries and not for commercial planting. Continuous
adoption of hotwater treatment will somehow minimize
the spread of these alarming diseases.
Effect on Growth & Yield
Hotwater treated canepoints produced higher
yields compared to the untreated. This could be attributed
to the increase in plant vigor due to disease elimination. A
yield difference from 2.3 to 29.70 LKg/ha was obtained.
.
LKg/HaVariety
treated untreatedDiff
Phil 8477
Phil 7464
Phil 56226
192.00
169.80
172.10
189.70
160.40
142.40
2.30
9.40
29.70
Source:N.S. Meneses & M.C. Alba. 2001. Effect of Successive Hotwater
Treatment on Yield & Control of Ratoon Stunting Disease;
___________________.2001. Evaluation on the Effect of
Integrated Disease Management of Downy Mildew Disease
of Sugarcane.
Photos taken by Dr. M.C. Alba.Basket specially made for the hotwater
treatment tank