ABSTRACT

Variability of endotoxin expression and/or concentration within transgenic cotton (Bt) varieties has been and continues to be a concern of cotton growers, researchers and breeders. While not a consistent problem, it is one which can cause major economic problems. Transgenic cotton varieties, to be effective, must produce additional levels of proteins which conventional cottons do not. Arysta Experimental NP 321, a protein transport enhancer, containing nitrophenolates has shown that it increases the efficacy of the endotoxin levels within transgenic cottons, resulting in higher worm mortality and yield. By binding to proteins and enhancing their movement throughout the plant, with the ultimate destination being the fruiting structure, NP 321 has increased endotoxin levels in leaves, petioles and squares as determined by Elisa testing and by actual feeding trials which produced an increase in the percentage of worm mortality. In addition, NP 321, through its protein binding and translocation capabilities, has produced yield increases even without heavy worm pressures.