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Prof. Ahmed Abdel-Ghafar Abdo Darwish :: Publications:

Title:
RATE AND CBLOROPBTLL CONTENT OF 5011E CROP SEEDLINGS
Authors: El-Lakwah; F.A..; Khattah, N.E.; Darwish, A.A. and Abd—El-Aziz, A.
Year: 1994
Keywords: Not Available
Journal: Not Available
Volume: Not Available
Issue: Not Available
Pages: Not Available
Publisher: Not Available
Local/International: Local
Paper Link: Not Available
Full paper Ahmed Abdel-Ghafar Abdo Darwish_001.jpg
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Abstract:

Tests were performed to study the effects of various concentrations of the four conventional insecticides malath ion, pirimiphos—rnethyt deltarnethrin, cy’permethrin. - end neemazal—? (a botanical insecticide contains 5% Azadiractiri) on seeds of wheat, maize, broad bean, cowpea. cotton and squash seeds. Criteria tested were germination rate, growth rate and chlorophyll content of their seedlings. Results showed rio significant differences in germination rate of maize, borad bean and squash seeds after treatment with the various conventioned insecticides. On the other hand, the germination of wheat and cowpea seeds was reduced after neemazal treatments at 1600, 3200 and 6400 ppm. Also, germi nation of cotton seeds was impaired after malathion, del tamethrin, cypermethrin and neemazal treatments at all con centrations. Growth rate of maize, cowpea and cotton seed lings was markedly affected by all the tested insecticides while wheat and broad bean seedlings were affected by neem— azal only. The chlorophyll A end B contents of wheat. maize, broad bean and cowpea seedling leaves were not markedly affected after malathion treatment. On ‘th. other hand, chlorophyll content was much more lower in cotton seedling leaves and higher in aquash. Pirimiphos—methyl treatment resulted in lower chlorophyll content of maize, cowpea. cotton and squash seedling leaves as compared with the control and did not affect on wheat and broad bean seedlings Deltamethrin had no obvious effect on the chlorophyll content for the various crop seedling leaves The same phenominon was found with cypermethrin treat ment, the total chlorophyll content of wheat, broad bean and squash seedlings was not significantly affected. On the other hand, it was reduced in maize and cotton and increased

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