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Published: 2011-03-30
Abstract Views: 79
DOI: https://doi.org/10.53747/nst.v1i1.294
Issue
Vol. 1 No. 1 (2011)
Section
Articles
How to Cite
DOAN , T. T., NGUYEN , T. K., VO , T. K. L., CAO , V. C., TRAN , T. T. A., & NGUYEN , H. H. T. (2011). EFFECTS OF IRRADIATION ON MEALYBUG Dysmicoccus neobrevipes (Hemiptera: Pseudococcidae) INFESTING ON DRAGON FRUITS. Nuclear Science and Technology, 1(1), 37-44. https://doi.org/10.53747/nst.v1i1.294

EFFECTS OF IRRADIATION ON MEALYBUG Dysmicoccus neobrevipes (Hemiptera: Pseudococcidae) INFESTING ON DRAGON FRUITS

DOAN THI THE1, NGUYEN THUY KHANH1, VO THI KIM LANG1, CAO VAN CHUNG1, TRAN THI THIEN AN2, NGUYEN HOANG HANH THI2
1 Research and Development Center for Radiation Technology 202A Street 11, Linh Xuan Ward, Thu Duc District, HCM City
2 Nong Lam University, HCM City Linh Trung Ward, Thu Duc Dist., HCM City

Main Article Content

Abstract

Radiotolerance of the mealybug Dymicoccus neobrevipes was investigated with different radiation doses. Development stages and life cycle of D. neobrevipes were determined by rearing under laboratory conditions (Temperature: 28±2°C, Relative humidity: 70±5%, Host: pumpkins). This species has four development stages including 1st, 2nd, 3rd instars and adults and one generation is approximately 30.5 ± 0.3 days. The effect of Co-60 gamma rays on the growth and reproductiveness of D. neobrevipes at different development stages were studied. The preliminary results showed that the radiation resistance of the D. neobrevipes increased with increasing of the development stage. Of the four stages tested, aldults were the most resistant to gamma rays as evidenced by the lowest mortality rate. After 21 days of 300 Gy treatment, the mortality rate of 1st, 2nd, 3rd instars and adults achieved 100%, 96%, 80% and 45%, respectively. Female adults can survive more than three weeks after irradiation at 400 Gy. The results also suggested that the minimum dose of 220 Gy (lower than required dose of 400 Gy) might be applied to control the reproduction of female adults at all growth stages.

Article Details

Keywords

Mealybug, gamma irradiation, quarantine treatment, dragon fruit, radiotolerance

References

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