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IMPACT OF TEMPERATURE AND RHIZOSPHERE COMPETENCE ON Beauveria bassiana AND Metarhizium anisopliae ON THEIR IN VITRO EFFICACY

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Title IMPACT OF TEMPERATURE AND RHIZOSPHERE COMPETENCE ON Beauveria bassiana AND Metarhizium anisopliae ON THEIR IN VITRO EFFICACY
 
Creator MAHESH BABU, GUNNALA
 
Contributor RAHMAN, S.M.A.S
 
Subject fungi, biological development, developmental stages, insecticides, germinability, concentrates, beauveria bassiana, pesticides, metarhizium anisopliae, biological phenomena
TEMPERATURE, RHIZOSPHERE, COMPETENCE, Beauveria bassiana, Metarhizium, anisopliae, VITRO, EFFICACY
 
Description Laboratory studies on “Impact of temperature and rhizosphere competence
on Beauveria bassiana and Metarhizium anisopliae on their in vitro efficacy ” were
conducted at AICRP on Biological Control of Crop pests and Weeds, Agricultural
Research Institute, Rajendranagar, Hyderabad during 2013-14. Radial growth,
conidial concentration and conidial viability were the main parameters taken up as
biological attributes to evaluate test fungi. Spodoptera litura was taken up as test insect for
carrying out rhizosphere competence studies.
The test fungi showed maximum growth, Sporulation and viability at 25 ºC and
declined precipitously as temperature increased to 35 ºC. As temperature increases above
or decreases below optimum ranges, conidial germination is decreased resulting in
inhibition of infection and impediment of mycosis (Hywell-Jones and Gillespie, 1990).
Dicot rhizosphere has been shown to support greater EPF survival than monocot
rhizosphere. The overall effect of plant species was such that tomato rhizosphere( 67.50)
and 66.25) was the least favourable for the fungal efficacy and most encouraging
rhizosphere was that of okra( 83.75 and 81.25) in resulting in the highest efficacy of
fungus across the species. When a combination of B.bassiana and M.anisopliae inoculated
to the pots mortality of the larvae may have been caused by any of the test fungi but
sporulation of only M. anisopliae was observed in the cadavers.
Among the pesticides tested Beauveria bassiana and Metarhizium anisopliae were
compatible with Fipronil (33.92) and Acephate (33.92) respectively. Fungicides were more
toxic when compared to insecticides. Carbendazim was found to be highly incompatible
with B. bassiana (76.78) and M. anisopliae (72.32) as it exhibited higher inhibition of
growth, sporulation and viability.
 
Date 2016-09-12T12:02:31Z
2016-09-12T12:02:31Z
2014
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/76424
 
Language en
 
Relation D9684;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD