1 April 2018 Numerical Response of Cyrtorhinus lividipennis (Hemiptera: Miridae) to Nilaparvata lugens (Hemiptera: Delphacidae)1
Ubon Tangkawanit, Nonglak Hinmo, Wirote Khlibsuwan
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Laboratory studies of the numerical response of the predator Cyrtorhinus lividipennis Reuter to its natural prey, Nilaparvata lugens Stal, determined the reproductive response to number of eggs oviposited, prey-dependent birth rate, prey-dependent mortality rate, and life cycle duration to different densities of N. lugens eggs. The experiments were conducted in cages with 1, 5, 10, 15, 20, and 30 eggs/predator per cage with 20 replications. The results indicated that the numerical response of C. lividipennis was positively related to prey density, with greater amounts of eggs laid, a longer duration of the lifespan, and adult age observed at a high prey density than a low prey density. However, the sex ratio and adult longevity were not affected by the prey density. The minimum prey density for completing C. lividipennis development was 5 eggs/d, whereas the minimum number of prey needed to produce an egg was 10 eggs/d. The study of the numerical response provided data for calculating the prey-dependent birth rate and prey-dependent mortality rate when C. lividipennis consumed one N. lugens egg. The results indicated that the prey-density–dependent birth rate was 0.123 eggs/bug/d and the prey-density–dependent mortality rate was 0.027 bugs/d.

Ubon Tangkawanit, Nonglak Hinmo, and Wirote Khlibsuwan "Numerical Response of Cyrtorhinus lividipennis (Hemiptera: Miridae) to Nilaparvata lugens (Hemiptera: Delphacidae)1," Journal of Entomological Science 53(2), 171-179, (1 April 2018). https://doi.org/10.18474/JES17-42.1
Received: 6 April 2017; Accepted: 1 June 2017; Published: 1 April 2018
birth rate
brown planthopper
death rate
numerical response
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