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Jornal of Al-Muthanna for Agricultural Sciences

مجلة المثنى للعلوم الزراعية

ISSN: 40862226
Publisher: Al-Muthanna University
Faculty: Science
Language:

This journal is Open Access

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ITS SCIENTIFIC MAGAZINE ITS CREATED FOR PUBLISHING SCIENTIFIC RESEARCH

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Table of content: 2013 volume:1 issue:10

Article
The effect of different temperatures in the growth and development of cucumber beetle (Fab) Epilachna chrysomelina
تأثير درجات الحرارة المختلفة في نمو وتطور خنفساء القثاء ( Fab) Epilachna chrysomelina

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Abstract

Results of Laboratory studies showed that all aspects of life cycle of the Epilachna chrysomelina (Fab.)were affected when reared on different temperatures (20, 25,30 and 35C° ) with relative humidity 70+ the shortest life cycle was at 30C°(75.95 days),While longest at 35C°(126.55 days ).The highest number of eggs laid by one female was 362 .94 eggs / female at 30 C° ,While the lowest was 77.98 eggs / female at 35C°. The highest larval and pupal survival percent were at 30 C° (82.17 and 91.88 %),respectively ,whereas lower percent at 20C°(52.79 and 74.06 % ), respectively . The higher hatching percent was at 30 C°(90.55% ) ,whereas the lower was at 35C° (44.04 % ). We conclude that the favorable temperature for growth and development of this insect was 30C° .

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