Fruit fly (Diptera: Tephritidae) population and its insecticidal control in 'Taptim Siam' pomelo (Citrus maxima Merrill) in the Nakhon Si Thammarat Province of Thailand

T. Thongjua, J. Thongjua
In pomelo, fruit fly damage will cause fruit drop. Therefore, it is necessary for farmers to use chemicals to control fruit fly. Four species of fruit fly: Bactrocera dorsalis, B. carambolae, B. papaya and B. correctaare found in pomelo orchards in the Pakpanang district, Nakhon Si Thammarat Province of Thailand. From April 2012 to July 2013 the above fruit fly species were trapped in the ratios of: 64:27:6:3, respectively. The efficacy of fruit wrapping, plant extracts, bio-insecticide, petroleum oil and insecticides for fruit fly control were conducted on 5-year-old pomelo plantations using RCBD experimental design with 3 replications and 9 treatments. Treatments were: 1) fruit wrapping with plastic bags; 2) ginger extract 50-70 mL 
20 L-1 of water; 3) Thai neem extract (aza. 0.05%) 100 mL 20 L-1 of water; 4) petroleum oil (83.9%) 50-100 mL 20 L-1 of water; 5) Bacillus thuringiensis 60-80 g 20 L-1 of water; 6) abamectin (1.8% EC) 30 mL 20 L-1 of water; 7) carbosulfan (20% EC) 30 mL 20 L-1 of water; 8) imidacloprid (10% SL) 8 mL 20 L-1 of water; and 9) control (non-treated). The treatments were applied 4 times at 10 day intervals on 3 month old pomelo fruit. Results on the effectiveness at harvest of treating 3-month-old pomelo showed the highest effective treatment was: 1) fruit wrapping (88.13%); 2) imidacloprid (86.39%); 3) carbosulfan (85.16%); 4) abamectin (85.02%); 5) petroleum oil (76.96); 6) ginger extract (74.29%); 7) Thai neem extract (69.14). The lowest effectiveness treatment was Bacillus thuringiensis (26.00%) compared with control (non-treated fruit).
Thongjua, T. and Thongjua, J. (2017). Fruit fly (Diptera: Tephritidae) population and its insecticidal control in 'Taptim Siam' pomelo (Citrus maxima Merrill) in the Nakhon Si Thammarat Province of Thailand. Acta Hortic. 1178, 169-174
DOI: 10.17660/ActaHortic.2017.1178.29
https://doi.org/10.17660/ActaHortic.2017.1178.29
Bactrocera dorsalis, fruit wrapping, plant extracts, petroleum oil, Thaineem
English

Acta Horticulturae