Effectiveness of Some Herbicides in Fertilizing and Non-fertilizing Conditions in Pre-germinated Direct Rice

Abstract

Comparisons of the effectiveness of benthiocarb, butachlor, CNP, nitrofen, and oxadiazon + 2 4-D in fertilizing condition non-fertilizing condition in pre-germinated direct seeded rice were made at two places namely Chai Nat Rice Experiment Station and Ratchaburi Rice Experiment Station in 1979-80. At Chai Nat Rice Experiment Station, trials were set up in both dry and wet seasons. The experiment was designed as a sokut okitm fertukuzubg at tge rate if 6-4-0 kg/ri and non+fertilizing as main plots and weed control treatments as sub-pkits (4x8 m2) with 4 replications. It was found that yield losses due to weeds were statisicall, different at Chai Nat, but not at ratchaburi. the rating of weed control and toxicity to rice showed the same results either in fertilizing or non-fertilizing condition.