Median Lethal Concentration and Efficacy of Bacillus Thuringiensis Against Banded Sunflower Moth (Lepidoptera: Tortricidae)
نویسندگان
چکیده
منابع مشابه
Resistance in sunflower and interaction with Bacillus thuringiensis for control of banded sunflower moth (Lepidoptera: Tortricidae).
Four sunflower accessions were compared with a susceptible check, hybrid '894', in the greenhouse to determine their resistance to the banded sunflower moth, Cochylis hospes Walsingham, and their interaction with Bacillus thuringiensis Berliner variety kurstaki. Antibiosis, expressed as lower larval weight, was detected in all of the accessions. In addition to being antibiotic, sunflower access...
متن کاملUsing banded sunflower moth (Lepidoptera: Tortricidae) egg density to estimate damage and economic distance in oilseed sunflower.
The banded sunflower moth, Cochylis hospes Walsingham (Lepidoptera: Tortricidae), is an important economic pest of sunflower in the Upper Great Plains of North America. Economic losses due to reductions in seed number, weight, and quality can be significant. Previously, the potential for economic losses were estimated by sampling for adult moths. However, sampling for moths can be difficult and...
متن کاملEfficacy of Bacillus thuringiensis against Phyllocnistis citrella (Lepidoptera: Phyllocnistidae).
The purpose of this work was to analyze the efficacy of Bacillus thuringiensis Berliner on the control of Phyllocnistis citrella Stainton (Lepidoptera: Phyllocnistidae) in laboratory and field trials. In the laboratory, four B. thuringiensis were used: Dipel (commercial formulation) tested at the concentrations of 25 x 10(6) and 25 x 10(8) spores/ml and the isolates K, 6, and 15 (collections of...
متن کاملLethal and sublethal effects of single and double applications of Bacillus thuringiensis variety kurstaki on spruce budworm (Lepidoptera: Tortricidae) larvae.
We conducted laboratory experiments to examine the effects of single versus double exposures of spruce budworm, Choristoneura fumiferana (Lepidoptera: Tortricidae) female larvae to various concentrations of a Bacillus thuringiensis variety kurstaki (Btk) commercial formulation (Foray 48B). Our main objective was to document the vulnerability to Btk and the sublethal responses of fifth-instar la...
متن کاملBIOLOGICAL CONTROL Synergy Between Zwittermicin A and Bacillus thuringiensis subsp. kurstaki Against Gypsy Moth (Lepidoptera: Lymantriidae)
Bacillus cereus French & French increased the mortality of 3rd-instar gypsy moths, Lymantriadispar(L.), causedbyBacillus thuringiensis subsp.kurstakiBerliner.B. cereusdidnotcause mortality of L. dispar when applied alone. The activity of various B. cereus strains was correlated positively with their accumulation of zwittermicin A, an aminopolyol antibiotic, in culture. When a constant dose of B...
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ژورنال
عنوان ژورنال: Journal of Economic Entomology
سال: 1999
ISSN: 1938-291X,0022-0493
DOI: 10.1093/jee/92.6.1289