Herbicide selectivity in transplanted rice (Oryza sativa L.) with pre-treatment applications subjected to varying durations of biomass decomposition and effect of seed treatment on growth and development of rice (Oryza sativa L.) at the Bayer CropScience Agronomic Development Southeast Asia : a research apprenticeship

Date

6-2016

Degree

Bachelor of Science in Agriculture

Major Course

Major in Agronomy

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Juanito V. Bariuan

Abstract

The major practice was conducted at the experimental station of Bayer CropScience in Masiit, Calauan, Laguna from April 11 to July 10, 2014. The objectives of the major practice were to train the practitioner to: 1) assist in conducting trial assessments on herbicide selectivity in rice 2) determine the herbicide selectivity of the different rate of decomposition in transplanted rice with herbicide pre-treatment applications 3) assist the center's researchers in testing new compounds and 4) show the different skills and techniques learned in herbicide application and in classifying and describing the key weeds infesting rice. Lodging and yellowing were the symptoms observed three days after transplanting. During one week of biomass decomposition, rice seedlings with applied Machete under no pre-treatment application showed a decreasing trend along the assessment periods and lowest phytotoxicity levels during the recovery phase of the rice seedlings. While applied MAD showed the highest phytotoxicity levels under the no pre-treatment application, seed and dip treatment during the recovery phase of the rice. For two weeks of biomass decomposition, rice seedlings with applied GRD under no pre-treatment application showed the lowest phytotoxicity level during the recovery phase of the rice. While applied MAD showed the highest phytotoxicity levels under the no pre-treatment application, seed and dip treatment during the recovery phase of the rice. For four weeks of biomass decomposition, rice seedlings with applied GRD under no pre-treatment application showed the lowest phytotoxicity levels among the other treatments, while applied MAD and Machete showed the highest phytotoxicity levels under the no pre-treatment application, seed and dip treatment during the recovery phase of the rice. Treated seeds had longer root and shoot length compared to the root and shoot length of untreated seeds. Untreated seeds senesced earlier after introduction of thrips, compared to the treated seeds. Besides learning from herbicide studies, much was gained in the proper use of insecticides, fungicides, and molluscicides as part of pest management strategies.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993 2016 A3 /D84

Document Type

Thesis

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