|Table of Contents|

Effect of Two Host Plants on the Cold Tolerance of the Diapause Pupae of Helicoverpa assulta (PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2014年12期
Page:
103-106
Research Field:
Publishing date:

Info

Title:
Effect of Two Host Plants on the Cold Tolerance of the Diapause Pupae of Helicoverpa assulta
Author(s):
 GAO Yu-hong1; ZHANG Yan-li1; ZHAO Wei-xing2
1.Zhengzhou Vocational Technology College,Zhengzhou,Henan 450121;
2.Institute of Horticulture,Henan Academy of Agricultural Sciences,Zhengzhou,Henan 450002
Keywords:
Helicoverpa assulta; host plant; supercooling point; diapause pupae; cold tolerance
PACS:
S 435. 72
DOI:
-
Abstract:
The effect of tobacco and pepper on the cold tolerance of the diapause pupae of Helicoverpa assulta were analyzed,by comparing supercooling and freezing point and survival rate of the diapause pupae between tobacco and pepper reared Helicoverpa assulta.The results showed that in the stage of 2-day-old pupae,supercooling and freezing point of the diapause pupae of Helicoverpa assulta had no difference between two host plants,in the stage of 5-day-old pupae and 9-day-old pupae,except freezing point of 5-day-old male pupae had no different,others all reached significant difference.Survival rates of diapause pupae changed greatly under the condition of low temperature at different treatment time.There was no difference of diapause pupae survival rate between two diets with 10 days and 20 days.Treatment for 60 days,regardless of the host,soil depth,male and female pupaldiapause pupae,basically all died.But with 30,40,50 days,the survival rate of diapause pupae with tobacco was significantly higher than pepper plant diet.That of female diapause pupae was higher than one of male diapause pupae.From cold tolerance point of view,tobacco was more inaptitude host plant.

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Last Update: 2014-08-01