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Effect of burial depth on emergence of Panicum repens

Published online by Cambridge University Press:  12 June 2017

Yukio Ishimine
Affiliation:
Agricultural Experiment Farm, Faculty of Agriculture, University of the Ryukyus, Okinawa, 903-0213 Japan
Hikaru Akamine
Affiliation:
Agricultural Experiment Farm, Faculty of Agriculture, University of the Ryukyus, Okinawa, 903-0213 Japan
Seiichi Murayama
Affiliation:
Department of Crop Science, Faculty of Agriculture, University of the Ryukyus, Okinawa, 903-0213 Japan
S. M. Moslem Uddin
Affiliation:
Department of Agricultural Chemistry, Okinawa Prefectural Agriculture Experiment Station, Naha, Okinawa, 903 Japan
Kiyoshi Kuniyoshi
Affiliation:
Department of Agricultural Chemistry, Okinawa Prefectural Agriculture Experiment Station, Naha, Okinawa, 903 Japan

Abstract

In glasshouse experiments, Panicum repens rhizomes with more than two nodes emerged from soil depths of 1 to 20 cm. Emergence from one-node rhizomes was greatly reduced at depths more than 5 cm. In contrast, culm emergence from ginger like rhizomes decreased when burial depth (BD) was greater than 20 to 30 cm. P. repens emerged from deeper soil levels with an increasing number of nodes per cutting. Culms emerged from 36% of total underground regenerative organs. About 75 and 95% of the emerged culms were recorded 30 and 60 d after burial, respectively, and 91% emergence was recorded from 20-cm BD. In field studies, only 9% of nodes produced culms following cross-plowing. About 61 and 67% of the emerged culms were recorded 50 and 60 d after land preparation, respectively. Results indicate that mechanical and chemical control methods could be most effective for P. repens when applied approximately 50 d after land preparation. Burying deeper than 30 cm by deep plowing and reducing rhizome length by cross-plowing might effectively reduce emergence of P. repens.

Type
Weed Biology and Ecology
Copyright
Copyright © 1999 by the Weed Science Society of America 

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