Zobrazeno 1 - 10
of 40
pro vyhledávání: '"M S, Foda"'
Publikováno v:
Zeitschrift für Angewandte Entomologie. 97:29-36
A series of mutagenesis experiments was carried out using Bacillus thuringiensis vars. kurstaki HD-251 and entomocidus HD-635, to obtain auxotrophic mutants as a means for elucidation of possible relation between the endotoxin potencies vs. some cott
Publikováno v:
Zeitschrift für Angewandte Entomologie. 97:139-145
Mutation experiments were carried out for isolation of mutants ot B. thuringiensis that are resistant to physical factors, namely UV-resistant and high temperature resistant mutants and which proved to be responsible for endotoxin decay. Also, resist
Publikováno v:
Zeitschrift für Angewandte Entomologie. 95:69-74
Investigations have been carried out to explore the activity of different combinations of Bacillus thuringiensis varieties vs. the cotton leafworm Spodoptera littoralis, S. exigua and Heliothis armigera. Some of the combinations used showed an obviou
Publikováno v:
Zeitschrift für Angewandte Entomologie. 91:388-398
In the present work, twenty nine cultures of Bacillus thuringiensis belonging to fourteen serotypes were screened with respect to their activities against the three lepidopterous cotton pests, Spodoptera littoralis, Heliothis armigera and Spodoptera
Publikováno v:
Zeitschrift für Angewandte Entomologie. 95:321-326
The persistence of spores of Bacillus thuringiensis in cotton cultivations in Egypt showed an obvious reduction after one day of weathering. The decay in the spores viability is progressively correlated with the time of exposure in the field. The spo
Publikováno v:
Zeitschrift für Angewandte Entomologie. 100:425-433
Biochemical approaches have been adopted to increase the potency of Bacillus thuringiensis var. entomocidus against the cotton leafworm Spodoptera littoralis. Chemicals of various groups were assessed with respect to their effect in increasing the po
Publikováno v:
Journal of Pest Science. 77:27-31
A search for means of biologically controlling the red palm weevil (RPW) Rhynchophorus ferrugineus resulted in the isolation of several microbial cultures belonging to bacteria, actinomycetes and fungi. Among the obtained cultures, three potent spore
Publikováno v:
Acta Biotechnologica. 13:351-359
α-Galactosidase (E.C.3.2.1.22) from Penicillium janthinellum was purified by precipitation and fractionation with ammonium sulphate, cold acetone or ethanol, calcium phosphate gel, and column chromatographies on Sephadex G-100 and G-200. The enzyme
Publikováno v:
Journal of Applied Entomology. 111:418-424
Fifty two cultures of Bacillus thuringiensis belonging to 10 varieties were screened with respect to the potency of their endotoxin preparations against larvae of greasy cutworm Agrotis ypsilon and cotton leafworm Spodoptera littoralis. The endotoxin
Publikováno v:
Anzeiger für Schädlingskunde Pflanzenschutz Umweltschutz. 72:21-23
The efficacy of the commercial product Dipel 2X (Bacillus thuringiensis var.kurstaki), was assessed as a biological control means of the cotton leaf wormSpodoptera littoralis attacking clover cultivations (Trifolium alexandrinum) in Egypt. Field expe