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Arthropods, 2015, 4(3): 78-89
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Article

Effects of temperature on population growth parameters of Cryptolaemus montrouzieri (Coleoptera: Coccinellidae) reared on Planococcus citri (Homoptera: Pseudococcidae)

Negar Saeedi1, Mohammad Reza Damavandian1, Hemmat Dadpour Moghanloo2
1Department of Plant Protection, College of Cultural Sciences, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
2Biological Control Research Laboratory, Amol, Iran

Received 11 May 2015;Accepted 10 June 2015;Published online 1 September 2015
IAEES

Abstract
The effect of temperature on the development, survival, fecundity and population growth parameters of Cryptolaemus montrouzieri Mulsant (Col.: Coccinellidae) reared on Planococcus citri Risso (Hom.: Pseudococcidae) was determined at five constant temperatures (18, 22, 26, 30 and 32¡À1¡ãC) in the laboratory conditions. Results showed a temperature - dependent development of the coccinellid. The mean total of immature period was estimated 76.6¡À0.9, 33.9¡À0.1, 25.8¡À0.1, 22.6¡À0.1 and 26.2¡À1.4 days at 18, 22, 26, 30 and 32¡ãC, respectively. The highest and lowest values of R0, rm and ¦Ë were obtained 369.9¡À50.2 and 2.5¡À0.8 (female/female/generation), 0.07¡À0.01 and 0.02¡À0.01 (female/female/day) and 1.08¡À0.01 and 1.02¡À0.01 (day-1) at 26 and 32¡ãC, respectively. The lowest values of generation time (T) and doubling time (Dt) were calculated 42.2¡À0.9 and 8.9¡À0.5 days at 32 and 26¡ãC, respectively. The lower and higher developmental threshold of total of immature period were obtained 11.5 and 25.5¡ãC, respectively. The thermal requirement for completion of total of immature period of this predator were estimated 400 DD. These results showed that 26¡ãC and/or adjacent temperature is most suitable for mass rearing of this predator.

Keywords development;life table;Cryptolaemus montrouzieri;degree day.



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