Revitalization of Rivers in India Draft Policy - Isha Guru Jaggi Vasudev

Revitalization of Rivers In India
Draft Policy Recommendation
Effect of Vetiver Hedge on Water & Soil Conservation
(Xu, Lu, & Truong)
Effect of Vetiver Hedge on Water & Soil Conservation
loss (Xu, and Lu, & rainwater Truong) run-off had been studied in various places. The two tables here
show data from two different studies.
5. OTHER ON-FARM APPLICATION OF VETIVER:
(Truong, Van, & Pinners, The Vetiver System for Agriculture, 2008)
a. Crop protection - stem borer control:
• Stem borers attack maize, sorghum, rice and millets in Africa and Asia. The
moths lay their eggs on the leaves of the crop.
• Professor Johnnie van den Berg, entomologist (School of Environmental
Sciences and Development, Potchefstroom University, South Africa) found that
the moths prefer to lay eggs on the leaves of vetiver planted around the crop
instead of on the maize or rice crop itself. Given the option, about 90% of the
eggs are deposited on vetiver instead of on the crop.
• Because vetiver leaves are hairy, the larvae that hatch on them cannot move
around easily. The larvae fall off the plant (photo 11) and die on the ground,
resulting in very high mortality, about 90%.
• Vetiver also harbours many helpful insects that are predators of pests that
attack crops.
Annexures
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