Interaction of 2, 4-D and Thiobencarb on Rice and Mungbean

Date

3-1984

Degree

Bachelor of Science in Agriculture

Major Course

Major in Agronomy

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Beatriz L. Mercado

Abstract

The study was conducted to know the response of rice and mungbean to single and combined application of 2,4-D and thiobencarb and to study the type of interaction involved.

Rice and mungbean seed were both germinated separately in petri dishes and in plastic cups. Effect of single and combined application of 2,4-D and thiobencarb of fresh weight, radicle,hypocotyl, root and shoot length of rice and mungbean were evaluated.

Inhibitory effect of single application of 2,4-D and thiobencarb were more evident in roots than in shoots of both rice and mungbean. Radicle and and hypocotyl length of mungbean became much shorter as the concentration of both herbicide were increased.

Radicle was longer when 1 to 7 ppm 2, 4-D was combined with 1 ppm thiobencarb. Hypocotly length was reduced when 1 and 2 ppm 2,4-D were combined with thiobencarb and stimulated when 6 and 7 ppm 2,4-D were combined with thiobencarb. Combining 1 and 100 ppm thiobencarb with 2,4-D also reduced hypocotyl length. In rice, combining thiobencarb with 2,4-D reduced root and shoot length when 100 ppm thiobencarb was combined with 2,4-D while combining 6 to 7 ppm 2,4-D with thiobencarb promoted root elongation.

In mungbean, combining 4 to 10 ppm 2,4-D with thiobencarb increased shoot length but reduced root length resulted when 1 to 6 ppm 2,4-D were combined with thiobencarb. Shoots of mungbean wre reduced when 1, 3 and 7 ppm thiobencarb were combined with 2,4-D while reduction in root length was noted when 1, 2, 3 and 5 ppm thiobencarb were combined with 2,4-D. 2,4-D and thiobencarb combination has no effect in fresh weight of rice and mungbean but single application of thiobencarb reduced fresh weight of rice and mungbean. No reduction in fresh weight of rice and mungbean treated with 2,4-D was noted but there was in rice. Synergism was noted in shoots of rice and antagonism in mungbean roots.

The observed syngergestic and entagonistic response of rice and mungbean to 2,4-D and thiobencarb combinations did not last long fresh weight of rice and mungbean 14 days after treatment did not reflect the difference earlier observed in root and shoot length of both crops.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 1984 A42 M46

Document Type

Thesis

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