Metwally,, M., Mansour, H., Shalaby, G. (2004). EFFICACY OF THE BACTERIUM Bacillus thuringiensis (Berl.) AND THE FUNGUS, Beauveria bassiana (Bals.) AS BIOLOGICAL CONTROL AGENTS AGAINST SOME SUGAR- BEET INSECTS IN THE FIELD AT KAFR EL-SHEIKH DISTRICT. Journal of Plant Protection and Pathology, 29(1), 443-449. doi: 10.21608/jppp.2004.239501
M. M. Metwally,; H. M. Mansour; G. A. Shalaby. "EFFICACY OF THE BACTERIUM Bacillus thuringiensis (Berl.) AND THE FUNGUS, Beauveria bassiana (Bals.) AS BIOLOGICAL CONTROL AGENTS AGAINST SOME SUGAR- BEET INSECTS IN THE FIELD AT KAFR EL-SHEIKH DISTRICT". Journal of Plant Protection and Pathology, 29, 1, 2004, 443-449. doi: 10.21608/jppp.2004.239501
Metwally,, M., Mansour, H., Shalaby, G. (2004). 'EFFICACY OF THE BACTERIUM Bacillus thuringiensis (Berl.) AND THE FUNGUS, Beauveria bassiana (Bals.) AS BIOLOGICAL CONTROL AGENTS AGAINST SOME SUGAR- BEET INSECTS IN THE FIELD AT KAFR EL-SHEIKH DISTRICT', Journal of Plant Protection and Pathology, 29(1), pp. 443-449. doi: 10.21608/jppp.2004.239501
Metwally,, M., Mansour, H., Shalaby, G. EFFICACY OF THE BACTERIUM Bacillus thuringiensis (Berl.) AND THE FUNGUS, Beauveria bassiana (Bals.) AS BIOLOGICAL CONTROL AGENTS AGAINST SOME SUGAR- BEET INSECTS IN THE FIELD AT KAFR EL-SHEIKH DISTRICT. Journal of Plant Protection and Pathology, 2004; 29(1): 443-449. doi: 10.21608/jppp.2004.239501
EFFICACY OF THE BACTERIUM Bacillus thuringiensis (Berl.) AND THE FUNGUS, Beauveria bassiana (Bals.) AS BIOLOGICAL CONTROL AGENTS AGAINST SOME SUGAR- BEET INSECTS IN THE FIELD AT KAFR EL-SHEIKH DISTRICT
1Plant Protection Research Institute, A.R.C. Giza, Egypt.
2Sugar Crops Research Institute, A.R .. C. Giza, Egypt
Abstract
Field experiments were conduced in 2001/02 and 2002/03 sugar-beet seasons at Sakha Agric. Res. Station aiming to study the efficacy of the bacterium, Bacillus thuringiensis (Beri.) and the fungus, Beauveria bassiana (Bals.) against some sugar-beet insects. Insect population of sugar-beet mining moth, Scrobipalpa ocel/alella (Boyd.) W<lS reduced by 36.32 and 42.13% twenty days after treatment when Dipel 2x was applied at a rate of 2.5 g/1. in season 2001/02 and 2002/03, reSjlecitJvey. More reductions were recorded using the fungus (Biofly) at a rate of 3 x 10 conidialml which gave 43.63 and 47.91%, twenty days after treatment in the two seasons, respectively. Reduction in the number 0 f I arvae and pupae 0 f the s ugar- beet fly, Pegomyia mixta (ViII.) were 37.26 and 47.75 by using Dipel 2x while, applying the plants by the fungus gave more reduction, 42.27 and 57.16%, in season 2001/02 and 2002/03, respectively. However, no significant differences in insect reductions were found between the t.VQ in biocides. Field experiments indicated that B. thuringiensis (Dipel 2 x) and B. bassiana (Biofly) could be used efficiently against S. ocel/atel/a and P. mi)(fa in sugar-beet fields.
Obtained results clearly indicated that the tortoise beetie, Cassida vittata (ViII.) is not sensitive to B. thuringiensis and B. bassiana throughout the period 0 f study. Spraying of 8. thuringiensis gave 14.91 and 16.42% reduction and B. oessiene gave 22.53 and 19.97% reduction in the two seasons, 2000/02 and 2002/03, respectively.
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