Changes in searching responses with temperature of Cyrtorhinus lividipennis reuter (Hemiptera: Miridae) on the eggs of the brown planthopper, Nilaparvata lugens (Stål.) (Homoptera: Delphacidae) uri icon

abstract

  • The functional response of Cyrtorhinus lividipennis Reuter attacking the brown planthopper (Nilaparvata lugens (Stal.), BPH) eggs on rice was determined at six constant temperatures of 20 degrees C, 23 degrees C, 26 degrees C, 29 degrees C, 32 degrees C and 35 degrees C. Rogers' (1972) random predator equations were fitted to the data for each temperature separately. The equation model adequately described a Holling's Type II functional response for C. lividipennis and produced biologically realistic estimates of attack rates and handling times at five experimental temperatures between 20 degrees C and 32 degrees C. However, at 35 degrees C, a negative handling time (Th = -0.0029) was produced. The effect of temperature was incorporated into Rogers' equation by making the attack rate (a) and handling time (Th) functions of temperature within the range 20 degrees C to 32 degrees C. The attack rate and handling time were fitted as hyperbola and reciprocal hyperbola functions of temperature respectively. The temperature incorporating four-parameter composite model fitted the combined data as well as did separate Rogers' equations based on the parameter estimates.

publication date

  • 1997
  • 1997
  • 1997