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Plant Protection and Weed Control Though Water Management |
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Balasubramanian A |
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- For controlling thripes in rice, the whole nursery is irrigated so as t o submerge the whole plant for some time and the water is drained to wash away the insects.
- Frequent irrigation is provided to the sugarcane fields for controlling termites. (This practice is popular in sandy soil areas of N. India as well, ed.) (This is also applicable to rats. Pers. Commn. –G.S. Saha).
- Constant submergence of rice fields at certain stages helps in controlling the weeds.
- In clayey soils, where summer ploughing is not possible the field is irrigated and weed seeds are allowed to germinate. Then the field is ploughed and the weeds are incorporated into the soil. This is done before sowing or transplanting the rice crops. (Apart from puddling the irrigated or medium low land paddy fields, G.S. Shah reported during a workshop on local knowledge that a farmer in district Faizabad eastern Uttar Pradesh irrigated his field and applied fertiliser after preparing the field for wheat sowing in rabi (winter) season. The weeds would be allowed to grow for two weeks. The fields are ploughed and wheat is sown late. The weeds so ploughed add green manure. There is a trade off between yield decline due to delayed sowing or early sowing but weed attack. ed).
- If a garden is heavily infested with weeds, particularly nut grass, the land is converted for two or three years into a wet land for rice cultivation. Afterwards the field is turned into garden land.
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| Traditional Plant Protection Methods in Tamil Nadu in Biological Methods of Pest Control, Proceedings of the Southern Regional Seminar Edited by K. Vijayalakshmi, Nv.21-22, 1988, PPST Foundation, Madras, pp.34-38 |
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