Abstract:
The field experiment was conducted in the farm attached to the Agricultural
College, Vellayani frr a period of two seasons to evaluate the performance of three
granular weedicides on the lethality of weeds of rice and on the growth and yield
of rice. There was no effect on the growth and yield of rice or on number and dry
weight of weeds. The differences between unweeded control and continuously hand
weeded treatment also remained nonsignificant both in terms of rice yield and weed
growth. This points to the fact that continuous water logging itself was effective
in keeping down weed growth and in preventing the consequent effect on rice
yield. There was no apparent toxicity of the chemicals on the existing weed
species of the area.