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Taiwan Agricultural Research Institute, Council of Agriculture, Executive Yuan--Publication-Journal of Taiwan Agricultural Research

Journal of Taiwan Agricultural Research

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Assessment of Bagging Protection at Different Timings and Mesh Sizes for Controlling Litchi Fruit Borer (Conopomorpha sinensis Bradley) on Litchi ‘Tainung No. 1’

Wang, T. C., J. W. Chang, and J. Y. Chang. 2019. Assessment of bagging protection at different timings and mesh sizes for controlling litchi fruit borer (Conopomorpha sinensis Bradley) on litchi ‘Tainung No. 1’. J. Taiwan Agric. Res. 68(1):40–46.

Assessment of Bagging Protection at Different Timings and Mesh Sizes for Controlling Litchi Fruit Borer (Conopomorpha sinensis Bradley) on Litchi ‘Tainung No. 1’

Tai-Chuan Wang1, Jer-Way Chang2, and Jen Yu Chang3,*

Abstract

    Litchi fruit borer (Conopomorpha sinensis Bradley) is the most important pest during the fruit growth and development in litchi. Generally growers use chemical pesticides to control pest efficiently. Bagging is an alternative method, providing suitable growing environment and safe fruit. The litchi variety ‘Tainung No. 1’ may have potential to develop into a low pesticide used variety due to its stable and high yield traits. A combination of suitable variety and bagging practices could be the resolution for production of safe litchi. This study considered two important approaches, timing and mesh size of net, for the experiment. Best fruit bearing without pest infestation was observed on panicles which had bagged at 3 wk after full female bloom. About 97.5% fruit from unbagged panicles were infested by litchi fruit borer, with 26.9% fruit weight loss and reduction of total soluble solids content (less than 17°Brix). In summary, 16-mesh net cannot absolutely protect fruit from damage by litchi fruit borers. It is recommended to use the more fine materials.

Key words: Litchi fruit borer, Bagging, Fruit quality, Yield, Mesh.


* Corresponding author, e-mail: r96b44007@ntu.edu.tw
1 Assistant Research Fellow, Department of Plant Protection, Chiayi Agricultural Experiment Branch, Taiwan Agricultural Research Institute, Chiayi, Taiwan, ROC.
2 Research Fellow and Head, Department of Horticulture, Chiayi Agricultural Experiment Branch, Taiwan Agricultural Research Institute, Chiayi, Taiwan, ROC.
3 Assistant Research Fellow, Department of Horticulture, Chiayi Agricultural Experiment Branch, Taiwan Agricultural Research Institute, Chiayi, Taiwan, ROC.

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