Nanchang, China        May 22 - 24, 2009

Nanchang, China        May 22 - 24, 2009

WISA 2009

WISA 2009

Second International Symposium on

Web Information Systems and Applications

Second International Symposium on

Web Information Systems and Applications

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Proceedings of the 2nd International Symposium on Web Information Systems and Applications (WISA 2009)

Nanchang, China, May 22-24, 2009

Editors: Fei Yu, Jiexian Zeng, and Guangxue Yue

AP Catalog Number: AP-PROC-CS-09CN001

ISBN: 978-952-5726-00-8 (Print), 978-952-5726-01-5 (CD-ROM)

Page(s): 230-233

Irradiation Effect of Continuous Diode Laser on Locusts and Host Plants

           Mingyin Yao, Muhua Liu, Jinhui Zhao, Qiang Zhou

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Abstract

To explore new physical means in controlling locusts, semiconductor continuous diode laser (wavelength 808nm, power 2W) was used to evaluate the effect of laser irradiation on locusts(Locusta Migratoria Manilensis) and host plants (fresh Gramineous Plant Green Bristle Grass).At different distances and time ,the heads of - instar nymphs and - instar nymphs were irradiated, and the death rate was observed two hours, two days and three days after treatment;the leaves and stems of host plants were irradiated ,and the growth state was observed.The results indicated that the locusts were killed when power density nears the tissue’s thermal damage threshold. Besides, the death rate was higher along with longer irradiation time, greater power density (nearer irradiation distance) and younger instar nymphs. At distance 3cm and time 2s,the death rate of - instar nymphs was 80% 3 days after irradiation, and the gross growth state of host plants kept well. So, locusts especially before instar nymphs can be killed easily and host plants are not influenced if only suitable laser energy and wavelength are chosen. In this work, the results proved it’s feasible to control locusts by laser.

Index Terms

laser irradiation; locust plague control; locusts; host plants

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