|Table of Contents|

Predatory Function of Philodromus cespitum on Soybean Aphids

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2015年03期
Page:
470-473
Research Field:
Publishing date:

Info

Title:
Predatory Function of Philodromus cespitum on Soybean Aphids
Author(s):
WU Yi1; ZHENG Guo1; LI Xue-jun1; YU Guang-wen2; LI Yan2
1.College of Chemistry and Life Science, Shenyang Normal University, Shenyang 110034, China;?
2.Agricultural Technology Extension Center of Xiuyan County, Xiuyan 114300, China
Keywords:
Predatory function;  Philodromus cespitu;  Soybean aphid;  Ecological regulation;  Caged field
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2015.03.0470
Abstract:
The predatory function of Philodromus cespitum（Philodromidae）on soybean aphid was studied in laboratory and field cages, on the basis of investigations on population dynamics of soybean aphid and P cespitum.Under the lab conditions, the functional response of P cespitum predating on soybean aphids were fitted to Holling-II model well; when the aphid/spider ratio less than 100, the predatory capacity of Pcespitum increased with increasing prey density; the daily maximum predatory capacity was 49.2 Under the caged field conditions, the daily maximum predatory capacity was 84.4; P cespitum had a preferable controlling effect on soybean aphid when the aphid/spider ratio was less than 50∶1; while the aphid/spider ratio was more than 50∶1, the population peaks of soybean aphids will be put off 3 days.It could conclude that P cespitum could play an important role in the ecological regulation of soybean aphid; however, P cespitum could not control soybean aphids efficiently without other natural enemies while soybean aphids were at stage of concentrated aphids, and the following rising and peak stages.

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Last Update: 2015-07-16