Research on individual equivalency of Phenacoccus solenopsis Tinsley based on biomass and its application
Lü Yong · China Plant Protection · 2011
The biomasses of 1st nymph,2nd nymph,3rd nymph,4～5 days and 12～14 days of female Phenacoccus solenopsis fed on cotton were tested.And the results indicated that weight of the insect body increased with its development.They grew up rapidly after 3rd age,and reached the peak at the age of 12～14 days.The relationship between the body weight and development stage could be described by the model Y=0.030 4X3.555 2.Individual equivalency index system was proposed and demonstrated based on the 3rd nymph.