Effects of Lecanicillium lecanii and Beauveria bassiana to Aphis gossypii (Hom.: Aphididae) in Sistan

Rasouli pour, M. H. (2014) Effects of Lecanicillium lecanii and Beauveria bassiana to Aphis gossypii (Hom.: Aphididae) in Sistan. Masters thesis, University of Zabol.

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The Cotton aphid (Aphis gossipy) is one of the most important greenhouse pest in Sistan region. Because of the tropical and subtropical climate of this region the Cotton aphid damages the products of this region seriously. Because of frequently use of insecticide like Organo chlorine, Organophosphat, Carbamate and artificial Pyrityois , the mechanism of persistence of pests has been progressed. E.g. nontoxic insecticide with highest esterase strength. And also microbial agent in the density model is developed by the effect of chemical on human health and environment. The pathogenic fungi as potential natural enemies in control pests are important. In this study , the effect of fungi LRC190 from Lecanicillium lecanii and TC11 from Beauuveria bassiana as biological control agent on development stage of adult aphid Aphis gossypii have been investigated by laboratory condition with 23 1 centigrade temperature , relative humidity 65 5 percent and photoperiod of 16 hours light and 8 hours of darkness. So the sensitivity of insect to fungi was investigated by scattering pollution. The affectivity of density of fungi`s spore in ml was calculated with (presence of distilled water with Tween 20 percent) four repetition for each density. Also the mortality for both pathogenic fungus during 10 days was calculated. During the investigation, the lowest mortality were in Lecanicillium lecanii and beauveria bassiana and it is related to density of spore at the rate of 23/63 and 20 percent and the highest mortality is related to density in ml at the rate of 92/69 and 81/81 and the calculated rate for both fungus were 6.2 105 and 1.29 106, respectively. The increase of mortality has direct relationship with aphid`s population. Based on the result of biometric we can conclude that the application of pathogenic fungus of insects Lecancillium lecanii and Beauveria Bassiana have positive effect on control of considered pest in Sistan region.

Item Type: Thesis (Masters)
Uncontrolled Keywords: bioassay, biological control, The Cotton aphid, Beauveria bassania, lecancillum Lecanii
Subjects: Q Science > QL Zoology
Depositing User: admin admin1 admin2
Date Deposited: 25 Jun 2016 06:54
Last Modified: 25 Jun 2016 06:54
URI: http://eprints.uoz.ac.ir/id/eprint/869

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