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Study on Spodoptera litura(Fabricins) Population Dynamics Regularity on Broccoli in Taizhou Area(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2013年15期
Page:
137-140
Research Field:
Publishing date:

Info

Title:
Study on Spodoptera litura(Fabricins) Population Dynamics Regularity on Broccoli in Taizhou Area
Author(s):
WANG En-guo1; LIU Wei-ming2
1.Plant Protection Station of Linhai City,Linhai,Zhejiang 317000；
2.Taizhou Vocational College of Science and Technology,Taizhou,Zhejiang 318020
Keywords:
broccoli; Spodoptera litura（Fabricins）annual population dynamic regulation; seasonal population fluctuation; influence factor
PACS:
S 436.35
DOI:
-
Abstract:
During the years from 2002 to 2012,gyplure monitoring method was used to carry out systematical monitoring at a certain site in order to explore the regularity of harm that Spodoptera litura (Fabricins) has done and thus the annual population dynamic regulation of Spodoptera litura(Fabricins) as well as the seasonal population fluctuation regulation could be drawn.The results showed that the occurrence frequency of Spodoptera litura(Fabricins) was 36.4% and annual population dynamic model was N=-18.416t2+182.51t+179.71，t={1，2，3，……，n}(n=11；r=0.6917*).Its seasonal population fluctuation was weakening from sowing and seeding to budding and fruiting with the following functional model：m=0.0002d2-0.0675d+6.7973，d={1，2，3，……，n}（n=186，r=0.9552**）.The main external causes for its seasonal quantity fluctuation were temperature with a correlation model as follows：M=0.243T2-6.9351T+46.681(n=108,r=0.5602**).Therefore,the period between July and September,with high temperature and little rain,was a highfrequency occurrence time for  Spodoptera litura (Fabricins) .The above mentioned models could be used to forecast  Spodoptera litura (Fabricins) at the growth period of broccoli and finally new precautions could be adopted.

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Last Update: 2014-08-13