Title: Effects of temperature on the development and reproduction of Orius minutus( Hemiptera: Anthocoridae)
Abstract: 【Aim】To illustrate the influences of temperature on the development and reproduction of experimental populations of Orius minutus. 【Methods】At a temperature gradient( 15,20,25,30 and35℃),the developmental duration,survival rate,fecundity and population parameters of O. minutus on prey Tyrophagus putresceniae were investigated in the laboratory. 【Results 】 Within the constant temperatures ranging from 15 to 35℃,the average duration of various developmental stages of O. minutus shortened as the temperature rose gradually. O. minutus needed 52. 45 d to complete a life cycle at15℃,while needed 14. 85 d at 35℃. The linear regression analysis showed that the developmental threshold temperature for O. minutus was 8. 89℃,and its effective cumulative temperature was 359. 20day-degree. The generation survival rate and the number of eggs laid per female peaked at 25℃,being17. 07% and 41. 00,respectively. The population trend index was less than 1 at 15 and 35℃,demonstrating that the mean population growth is negative. On the contrary,the population trend index was greater than 1 at 20- 30℃ and reached the maximum( 3. 92) at 25℃. The net reproductive rate,the intrinsic rate of increase and the finite rate of increase peaked at 25℃,being 3. 32,0. 04 and 1. 04,respectively. The generation time of the population was the longest( 57. 76 d) at 15℃,but the shortest( 17. 50 d) at 35℃. 【Conclusion】The most suitable temperature range for the development of O. minutus on T. putresceniae is 25- 35℃,while the most suitable temperature for its survival,reproduction and the population growth is 25℃. These results provide the basic reference data for artificial rearing of O.minutus using T. putresceniae.
Publication Year: 2016
Publication Date: 2016-01-01
Language: en
Type: article
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Cited By Count: 3
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