n African Entomology - Developmental biology of vine mealybug, (Signoret) (Homoptera : Pseudococcidae), and its parasitoid (Timberlake) (Hymenoptera : Encyrtidae)

Volume 13, Issue 1
  • ISSN : 1021-3589



Life table analyses were conducted for and at five temperatures between 18 and 30 °C. The intrinsic rates of increase () for both species were similar, reaching maxima at 25 °C (=0.169 for ; =0.149 for ). The net replacement rate () of was higher than that of at all five temperatures tested. The of reached a maximum at 21 °C (308.87 days) and that of at 25 °C (69.94 days). The lower and upper threshold temperatures for development of were estimated at 16.59 and 35.61 °C, respectively. The lower threshold for development of was 8.85 °C. The upper threshold could not be determined as there was no turning point on the graph. Both insects were well adapted to temperatures in the Western Cape Province.

Loading full text...

Full text loading...


Article metrics loading...


This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error