What question did this study set out to answer?

The research aims to determine the biological characteristics of Phenacoccus manihoti on cassava plants.

Biological Characteristics of the Cassava Mealybug Phenacoccus Manihoti (Hemiptera: Pseudococcidae)

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The study investigates biological traits of the cassava mealybug, indicating key factors for pest management.

The research aims to determine the biological characteristics of Phenacoccus manihoti on cassava plants.
Conducted the experiment on Santa Helena cultivar under controlled conditions at 25 °C.
Placed approximately 20 newly oviposited eggs on apical leaves of each plant for observation.
Monitored first-instar nymphs, recording molting time and collecting data on mortality and oviposition.
Constructed a fertility life table based on gathered data.
Completed 90 replicates for statistical significance.
Average duration for each life stage: egg (7.7 days), first-instar (6.9 days), second-instar (4.9 days), third-instar (5.7 days), adult (20.7 days).
Total life cycle averaged 45.22 days, with females producing an average of 247 eggs each.
Net increase rate (R) was 223.640 female/female, mean generation time (T) was 36.500 days.
Intrinsic rate of increase (r m ) was 0.145 female/female/day, and doubling time (D t ) was 4.780 days.
Maximum population increase occurred on the 36th day.

Barilli et al. (2014) studied this question.

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