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STUDIES ON NEEM AZADIRACHTA INDICA A. JUSS DERIVATIVE AS PROTESTANTS AGAINST STORED GRAIN INSECT

Nazli, Rahila (1997) STUDIES ON NEEM AZADIRACHTA INDICA A. JUSS DERIVATIVE AS PROTESTANTS AGAINST STORED GRAIN INSECT. PhD thesis, University of Karachi, Karachi.

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Abstract

The neem tree contains promising pest control substance which are effective against many economically important insect pests of crops and stored grain. Neem oil samples from Hyderabad and Shikharpur were the most promising repellents against Tribolium castaneum. For growth inhibition effects out of six samples applied expeller extracted neem oil form Karachi was the most effective against T.castaneum. Hyderabad samples of neem oil was the most significant against Rhyzopertha dominica and from Dokri against Callosobruchus analis. Neem bitters proved more effective growth inhibitor than neem oil at all application rates against R. dominica. In neem oil the number of progeny adults and weight of sitophilus oryzae were higher than neem bitters. Number of progeny adults of C. analis were significantly lower in neem bitters. Neem cake prepared form Karachi seed sample on expeller was promising growth inhibitor against R. dominica, Trogoderma granarium and C. analis. Hexane extracted neem cakes was more effective growth inhibitor of S. oryzae. Synergistic effect of neem oil with turmeric oil revealed a significant reduction in the number of progeny of T. castaneum, in 1:1 and 9:1 combinations as compared with control. Mustard oil combined with neem oil indicated antagonistic influences. When these three oils applied in various combinations had no significant in their effectiveness against T. castaneum. In cases of R. dominica when neem oil, turmeric oil and mustard oil applied individually had significant reduction in the number of progeny adult but when applied in various combinations did not show any synergistic effect rather these were antagonistic to neem oil. At Dokri and Thatta effects of different treatments on weeviled grain, moisture content, thousand grain mass and pest infestation were studied. Weeviled grain the experiment in Thatta and Dokri was significantly lover in PEPF (Polyethylene enclosure Enclosure and phosphine Fumigation and coopex. Moisture content in PEPF was significant in both the sites. Neem oil applied to bag had significantly higher thousand grain mass in Dokri. There was significant increased in weeviled grain after 2 months and moisture content after 6 months storage in Thatta and Dokri. In interaction effects of treatment and storage period application of neem oil to bag had no weeviled grain until 2 months in Thatta Dokri neem Bond-A was more effective than neem oil throughout 12 months. Moisture content was remained higher in Thatta than Dokri in almost all the treatments but neem Bond-A, coopex and PEPF showed more or les lower level of moisture content. Most of the treatments did not show any impact on thousand grain mass but these effectively controlled weeviled grain for 6 months or longer different treatments had significant effect on the population development of R. dominica, C pusillus and S. oryzae for different period in rice stored in Thatta and Dokri.

Item Type:Thesis (PhD)
Uncontrolled Keywords:neem azadirachta indica a. juss, neem tree, tribolium castaneum, rhyzopertha dominica, callosobruchus analis
Subjects:Biological & Medical Sciences (c) > Biological Sciences(c1) > Paleo-zoology(c1.10)
ID Code:1054
Deposited By:Mr. Muhammad Asif
Deposited On:19 Dec 2006
Last Modified:04 Oct 2007 21:04

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