EFFICACY OF AQUEOUS NEEM SEED EXTRACT IN THE CONTROL OF TWO MORPHS OF GREEN PEACH APHID (MYZUS PERSICAE SULZ.) AND AGRONOMIC PERFORMANCE OF PEPPER (CAPSICUM ANNUM L.)

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dc.contributor.authorLAWAL, FATIMA
dc.date.accessioned2016-03-23T08:23:42Z
dc.date.available2016-03-23T08:23:42Z
dc.date.issued2015-10
dc.descriptionA THESIS SUBMITTED TO THE SCHOOL OF POSTGRADUATE STUDIES, AHMADU BELLO UNIVERSITY, ZARIA, NIGERIA IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE AWARD OF MASTER OF SCIENCE (M.Sc.) DEGREE IN BIOLOGY DEPARTMENT OF BIOLOGICAL SCIENCES, FACULTY OF SCIENCE, AHMADU BELLO UNIVERSITY, ZARIA, NIGERIAen_US
dc.description.abstractA field cage experiment was conducted to determine the aphicidal efficacy of aqueous neem (Azadirachta indica Juss) seed extracts in comparison with Neemazal and Deltrin against lemon and dark green morphs of the Green peach aphid (Myzus persicae Sulz.) and its effect on agronomic performance of four selected pepper varieties. Field experiment was conducted using a Randomized complete block design with three replications. The pre-infested pepper varieties were sprayed with three concentrations of aqueous neem seed extract (ANSE) at 0.2g/ml (100%, 75% and 50%). Aphid morphs mortality was assessed at 24hr, 48hr, 120hr and 168hr after treatment application. The present study indicates a high percentage mortality of aphid morphs in the treated plots as compared to tap water treated plots. At 168hr after treatment application 100% ANSE (94.69%), 75% ANSE (96.52%) and 50% ANSE (96.34%) showed better aphicidal efficacy than Deltrin (85.90%) when used as aphicide on lemon green morphs (LG) infested pepper varieties. ANSE concentrations resulted in higher percentage mortality than Neemazal for both morph infestation. Pepper plants infested with dark green morphs (DG) of M. persicae had optimum growth and fruit production at 50% ANSE concentration followed by Neemazal, 75% ANSE, Deltrin, 100% ANSE and then tap water. 50% ANSE resulted in a 66.70% increase in fruit yield over tap water treated plots and 11.12% increase over deltrin, while for LG morph infestation, yield of pepper treated with 50% ANSE increased by 33.34% over tap water treated plots. The improved growth and yield achieved at 50% and 75% ANSE concentration as compared to 100% ANSE could be attributed with low toxicity of ANSE constituents at these concentrations.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/7523
dc.language.isoenen_US
dc.subjectEFFICACY,en_US
dc.subjectAQUEOUS NEEM SEED EXTRAC,en_US
dc.subjectCONTROL,en_US
dc.subjectMORPHS,en_US
dc.subjectGREEN PEACH APHID,en_US
dc.subject(MYZUS PERSICAE SULZ.),en_US
dc.subjectAGRONOMIC PERFORMANCE,en_US
dc.subjectPEPPER,en_US
dc.subject(CAPSICUM ANNUM L.)en_US
dc.titleEFFICACY OF AQUEOUS NEEM SEED EXTRACT IN THE CONTROL OF TWO MORPHS OF GREEN PEACH APHID (MYZUS PERSICAE SULZ.) AND AGRONOMIC PERFORMANCE OF PEPPER (CAPSICUM ANNUM L.)en_US
dc.typeThesisen_US
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