Evaluation of Bacillus Thuringiensis and Ovicide Combinations Against Bollworm and Tobacco Budworm, 1994

Abstract

Cotton was planted on 5 May at the Robert Fratesi farm in Jefferson County. Plots consisted of 6 rows (40 inch centers) × 50 ft. Treatments were arranged in a RCBD with 4 replications. Insecticide treatments were applied on 30 Jun, 4 Jul, 23 Jul and 11 Aug with a CO2 sprayer mounted on a John Deere 6000 hi-cycle. Total volume was 10.6 gpa at 30 psi using Teejet TXVS-8 nozzles on 20 inch spacing. Insect counts were made at 4 DAT by whole plant examination of 10 row ft in the center of each plot.

Evaluation of Some Environmentally Safe Cemicals Against Spodoptera littoralis

“…Generally, efficacy of IGRs have a very good additive toxicity for Dipel-2X either in Lab or Field Spodoptera strains. These results are agreement with finding (Salama, et al, 1992;David and Joanne, 1996;Klein, et al, 1996;Pree and Daly, 1996;Liburd, et al, 2000& Mona, et al, 2004 whom found that when certain pairs of drugs or insecticides are administered together, the effects may be greater or less than might be expected from the sum of the activities of the components when administered separately. The phenomena involved, included under the term "synergism" "potentiation" and "antagonism", are becoming increasingly important in, for example, practical insect control and mammalian toxicology.…”

“…Attention was therefore paid to control insects using different non traditional insecticides, e.g., insect growth regulators (IGRs) and Bacillus thuringiensis (BT). (Klein, et al, 1996;AbdelHalim, 1997& Rizk, et al, 1999.…”

“…against Spodoptera littoralis (Lecadet and Martouret, 1987;Entwistle, et al, 1993;Klein, et al, 1996& AbdelHalim, 1997. Bacillus thuringiensis subsp.…”