Weed Control in Water Hyacinth and Road Side

Weed Control in Water Hyacinth and Road Side

Control of Water Hyacinth:

It is a perennial, free floating aquatic wee, fibrous roots weed; fibrous roots hang in water, produced by seeds and root reproduction. Interferes the surface transport in water.


Dredging mechanically and chaining. 2.4-D is effective @ 1-8 kg/ha. Amine and Ester forms @ 1-1.5 kg/ha are commonly used. Spray conc. 0.3%.
Paraquat (1 kg/ha) and Amitrol (3-5 kg/ha) cause quicker sinking of hyacinth. Fenac @ 0.1 kg/ha also used against it. Both mechanical and chemical methods need to be repeated 2 to 3 times.

Road Side Weed Control:


1. Mowing, burning, discing, blading, hand pulling, hoeing, and chemical treatments.
2. Soil sterilization with Sodium chlorate, Sodium arsenate, Boren, Fenuron, Monuren, Diuron, Bromacil, Fenac, TCA and Sinazine.
3. Soil fumigants : Mehtam. DMTT etc.

A mixture of 2.4-D and 2.4-5 T destroy many weed species along telephone and power lines.
Control of prickly pear s(Opuntia ) or Cactus : 2.4,5-T, Silvex and Pichloram 2 kg/ha are possibly used. Biological control is also successfully tried in India.

Control of Lantana Camera:

Biological control has been successfully tried in Hawaii.

Herbicidal Control:

0.4% aquaeous spray of mixture of 2.4-D and 2.4,5-T (2:1) in small infestations these herbicides may be applied with stump treatment. The herbicides translocate from buds to lower parts of Lantana and controls it.

Rail Roads:

Contact herbicides like Dinitrophenol, Pentachlerophenol and Sodium pentachlorophenate have been used for annual weed control and top growth of perennials. Sodium trichloroacetate also alone or in combination with 2.4-D is used. A mixture of aromatic oils of petroleum, polychoroctyle and 10% acid arsenicals give good result in control of top vegetat on and root of weed plants.

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