The Field Evaluation of Chrysoperla carnea and The Biocidal Oxymatrine for Controlling of Tuta absoluta in Open Tomato Fields in Wasit Governorate

Abstract

The results showed the possibility of using the aphid lion in control of this insect .The results showed that the field was empty of infection through 5 weeks after the first release of the individuals of the predator, where the percentage of infection reached zero in the field and began to appear after the seventh week .While the injury was zero when two releases were fired until the eleventh week when it started to appear after it .While The field was empty from injury until the end of the season after 17 weeks. The results also showed the effect of the release of the aphid lion and the number of its releases on the density of the population of the pest in the field, as it was morally high, especially after the seventh week of the launch of the aphids lion when the aphids lion was launched once and twice compared to when the aphids lion was launched three times. As for the biopesticide Oxymatrine 2-4 SL, it reduced the incidence to 3% in the fruits after 8 days of the spraying of biopesticide action from 20% one day before the spraying of biopesticide compared to the infection reached 35% after 8 days of the spraying of biopesticide from 20% one day before the spraying of biopesticide and the effectiveness of the pesticide increased from 36% the day after the spraying of biopesticide to 91% after 8 days of the spraying of biopesticide .While the biopesticide Oxymatrine, it reduced the infection to 3% in the fruits after 8 days of the spraying of biopesticide from 20% one day before the spraying of biopesticide compared with controlled treatment when the infection reached 35% after 8 days of the spraying of biopesticide from 20% one day before the spraying of biopesticide and the effectiveness of the pesticide increased from 36% one day after the spraying of biopesticide to 91% after 8 days of the spraying of biopesticide , While the number of live individuals in the leaves decreased to zero after 8 days of spraying of biopesticide compared to the number of live individuals in the leaves in the comparison spraying of biopesticide, which increased to 30 live individuals, and the effectiveness of the pesticide in killing live larvae in the leaves increased from 33% after one day of the spraying of biopesticide to 100% after 8 days of spraying of biopesticide