Effects of Temperature on the Life History Parameters and Population Growth Rates of Hyalopterus pruni (Hemiptera: Aphididae)

Abstract

The mealy plum aphid, Hyalopterus pruni (Geoffroy) (Hemiptera: Aphididae) is a pest of prune trees in California. The impact of aphids as pests is well characterized by their population growth rate, a parameter integrating their age-specific development, survivorship, and fecundity. These population parameters were measured at five constants temperatures on potted prune trees. Development rates increased with temperature up to an optimum. The relationship between development rate and temperature was described by linear and nonlinear models. Developmental threshold temperature was greater for the nonlinear model than for the linear model. Thermal requirement for development and maximum lethal temperature determined by these models were similar to those for other aphids. The greatest proportional survivorship of nymphs occurred at 26 degrees C. Mean daily fecundity was lowest at 14 degrees C and highest at 22 degrees C. Adult longevity decreased with temperature. Population growth rates for H. pruni were estimated from measurements of fecundity and development time and were highest at 22 degrees C. This is the first study to document the temperature dependence of the life history parameters for H. pruni and the first to generate a degree-day model for the prediction of phenological events.

A laboratory and field condition comparison of life table parameters of Aphis gossypii Glover (Hemiptera: Aphididae)

“…Satar et al (2005) reported that developmental periods of immature stages of A. gossypii under laboratory conditions, ranged from 10.8 days at 15°C to 4.1 days at 30°C and 32.5°C. Adult longevity of Hyalopterus pruni (Geoffroy) decreased when the temperature increased (Latham and Mills 2011). Yang and Chi (2006) reported that mean developmental times of Bemisia argentifolii Bellows and Perring decreased with an increase in temperature.…”

Reduction of Crop Diversity Does Not Drive Insecticide Use

“…The number of heat units accumulated during a specific period is an essential factor pest population dynamics (Latham & Mills, 2011). We used accumulated growing degree-days (GDD) above 9.475 °C, the average base developmental threshold temperature among 287 pest arthropods listed in the Insect Development Database (IDD) (NAPPFAST, 2015;Nietschke et al, 2007).…”

The Probable Spreading and Risk Assessment of the Corn Cyst Nematodes Heterodera zeae and Punctodera chalcoensis on Maize in Belgium and the Netherlands

“…The CLIMEX model is a popular simulation software program [31,32] designed for conducting risk assessments for insect pests, weeds and diseases [33][34][35][36][37][38][39][40][41]. The program has the advantage, in comparison to other climate modeling softwares, that it includes a global meteorological database, which enables its Compare Locations module to be process-oriented.…”