Herbicide selectivity in transplanted rice (Oryza sativa L.) at different planting depths and effect of seed treatment on shoot and root lengths of rice 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 in Bayer Crop Science Agronomic Development Southeast Asia, Calauan, Laguna. The duration of the study was from April 11 to June 20, 2014. The specific objectives of the major practice were 1) to participate in an experiment that compares the selectivity of herbicides on transplanted rice at different planting depths 2) to observe and identify the phytotoxicity symptoms due to the herbicides and 3) to evaluate the response of rice to seed treatment with pesticide. An experiment was conducted to determine the response of irrigated lowland rice cultivar NSIC Rc-18 to herbicides planted at different depths namely, shallow at 2 centimeters, normal at 4 centimeters, and deep at 6 centimeters. The phytotoxicity symptoms that were frequently present were stunting, lodging, and thinning. 5 days after application, normal and deep planting depths presented lower percentage of general phytotoxicity than shallow planting depth. General phytotoxicity was highest in shallow planting depth 9 days after application. 14 days after application, there was a general reduction in phytotoxicity. Rice recovered after 21 days of herbicide application at the highest planting depth. The effect of seed treatment on root and shoot length of rice cultivar NSIC Rc-18 was observed. Seven days after planting the mean roots of untreated seeds were longer and shoots of those treated with Gaucho were longer. Mean root length for those treated with Gaucho was highest and mean shoot length was also higher. Seedlings from unprotected seeds were not protected from introduced thrips. The student acquired supplementary understanding of the methods of conducting research, planning and establishment of experiments and pest and disease management practices.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993 2016 A3 /A48

Document Type

Thesis

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