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Journal of Tea Science ›› 2020, Vol. 40 ›› Issue (6): 807-816.doi: 10.13305/j.cnki.jts.20200930.001

• Research Paper • Previous Articles     Next Articles

Oviposition Behavior and Effect of Temperature on the Overwintering Egg Development of Pochazia Guttifera

JIN Yinli1,2, MA Quanchao1, ZHANG Shaojie1, YIN Jian1, SHI Hongzhong1, GENG Shubao1,*   

  1. 1. Xinyang Agriculture and Forestry University, Xinyang 464000, China;
    2. Henan Key Laboratory of Tea Plant Comprehensive Utilization in South Henan, Xinyang 464000, China
  • Received:2020-06-24 Revised:2020-07-13 Online:2020-12-15 Published:2020-12-10

Abstract: In order to clarify oviposition behavior and effect of temperature on the overwintering egg development of Pochazia guttifera Walker, its occurrence and damage were systematically investigated by five-point sampling method, and the effect of temperature (16℃, 19℃, 22℃, 25℃ and 28℃) on the development of its overwintering egg was also studied. The results show that P. gutifera preferred to lay overwintering eggs in tea branches with diameter of (0.23±0.04)cm. The mean length of oviposition scar damaged on tea branch was (1.36±0.59)cm, and the damage rates (13.35%) of tea branch in Maanshan tea garden (managed extensively and more host plants around) was significantly higher than others. The results also indicate that the developmental duration of overwintering eggs decreased with the increase of temperature. The developmental duration of the overwintering eggs was (28.75±7.03)d at 28℃. The initial hatching time of nymph was earlier and the hatching rate was higher at 28℃. The linear relationship between the temperature and the developmental rate of overwintering eggs was y=0.001 9x–0.022, and the developmental threshold temperature was 11.58℃. The effective accumulated temperature was 526.32 d·℃. This study provided a theoretical basis for prediction and control strategies of the overwintering population of this pest.

Key words: Pochazia guttifera, oviposition behavior, tea plant, developmental duration, developmental threshold temperature, effective accumulated temperature

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