http://www.orissa.gov.in/agriculture/Kharif/Kharif%20Mannual-2008.pdf

Interculture for weed control

First flowering comes 16-18 days after germination. Give first hoeing and weeding within 2-3 week stage. Earth up erect and semi-erect types, which will help pegging. Second weeding in spreading types may be given within one month, if necessary. Rotary peg weeder/wheel finger weeder should be used. Pod formation starts after 35 days of germination in erect varieties. Do not disturb the soil after flowering commences. Destroy collar rot and bud necrosis affected plants, no sooner than are observed.