Location: Crop Improvement and Protection Research
Title: Nitric oxide fumigation for control of navel orangeworm in walnutAuthor
YANG, XIANGBING - University Of California | |
Liu, Yong Biao | |
SIMMONS, GREGORY - Animal And Plant Health Inspection Service (APHIS) | |
Light, Douglas | |
Haff, Ronald - Ron |
Submitted to: Methyl Bromide Alternatives and Emissions Research Conference Proceedings
Publication Type: Proceedings Publication Acceptance Date: 9/13/2019 Publication Date: 11/3/2019 Citation: Yang, X., Liu, Y.-B., Simmons, G., Light, D.M., Haff, R.P. 2019. Nitric oxide fumigation for control of navel orangeworm in walnut. Proceedings of MBAO: Fumigation and Alternatives for Production, Storage and Trade Conference, 61-1, November 11-13, 2019, San Diego, California. Interpretive Summary: Technical Abstract: The navel orange worm, Amyelois transitella (Walker), is a major pest of harvested nuts including walnut, almonds, and pistachios. Nitric oxide (NO) is a potent fumigant with strong efficacy against a wide range of insect pests, including both external and internal feeders. Due to the oxidation of NO, NO fumigation has to be conducted under the ultralow oxygen (ULO) conditions and has to be flushed with inert gas, such as nitrogen gas, at the end of fumigation. In this study, we evaluated the efficacy of NO fumigation against A. transitella at different life stages at 25°C under ULO conditions (?? ppm O2). When A. transitella in wheat bran was fumigated, complete control of eggs was achieved in 16 and 8 h at 2.0 and 3.0% NO, respectively; control of small and large larvae was achieved in 16, 8, and 4 h at 0.5, 1.0, and 2.0% NO, respectively; and control of pupae was achieved in 24, 16 and 8 h at 0.5, 1.0, and 2.0% NO, respectively. When A. tranistella was fumigated inside unshelled walnuts, complete control of small larvae was achieved in 16, 8, and 6 h at 0.5, 1.0, and 1.5% NO, respectively; control of large larvae was achieved in 24, 8, and 4 h at 0.5, 1.0, and 2.0% NO, respectively; and control of pupae was achieved in 24, 16, and 8 h at 0.5, 1.0, and 2.0% NO, respectively. These results demonstrate commercial potential of NO fumigation for control of all life stages of A. transitella on walnut. |