التفاصيل البيبلوغرافية
| العنوان: |
Occurrence and Damage Regularity of Spodoptera litura in Broccoli. |
| المؤلفون: |
Weiming Liu, Enguo Wang, Yenan Liu |
| المصدر: |
Plant Diseases & Pests; Aug2021, Vol. 12 Issue 4, p5-8, 4p |
| مصطلحات موضوعية: |
SPODOPTERA littoralis, BROCCOLI, ATMOSPHERIC temperature, HIGH temperatures, MOTHS, SEASONS |
| مستخلص: |
[Objective] The paper was to explore the occurrence and damage regularity of Spodoptera litura in hroccoli, and to reveal the annual movement regularity and seasonal fluctuation regularity of S. litura population. [Method] The monitoring data of sexual attractants at fixed points for 11 consecutive years were summarized and analyzed. [Result] The large occurrence frequency of S. litura in Taizhou was 36.4%; the annual movement showed a downward-opening paraholic form, and the movement trajectory was I=-18.416t2+182.51t + 179.71, t={1, 2, 3, •••, n}(n=11; r=0.691 7*). The seasonal fluctuation showed a trend of peak oscillation attenuation curve, and the total moth quantity gradually decreased from sowing to heading stage. The functional model of average daily quantity was m=0.000 2d2-0.067 5 d+6.797 3, d={1, 2, 3, •••, n} Jn=186, r=0.955 2**). Air temperature was the main external factor affecting the seasonal variation of quantity, and there was a significant correlation between the number of ten-day moth trapping quantity and ten-day average temperature: J=0.243T2-6.935 1T+46.681 Jn = 108, r=0.560 2**) or J=2.734 4T-35.446 Jn=108, r=0.500 3**). Therefore, the moth quantity in the field increased with the increase of ten-day average temperature, and the period from July to September with high temperature and less rainfall was the peak occurrence period of S. litura. [Conclusion] These models can be used to improve the prediction and early warning levels of S. litura in broccoli, and has good guiding significance for decision-making and prevention. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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