Insecticidal activity of isolated Purpureocillium lilacinum PL1 against whitefly, Bemisia tabaci Gennadius (Hemiptera: Aleyrodidae) on cassava plantations in southern Viet Nam

Egyptian Journal of Biological Pest Control

Table 1 Efficacy of Purpureocillium lilacinum PL1 at different concentrations on the mortality of Bemisia tabaci nymphs in vitro at different time intervals

% Mortality of Bemisia tabaci nymphs
Days after treatments	Purpureocillium lilacinum PL1 concentration (conidia/ml)
Days after treatments	1 × 10⁴	1 × 10⁵	1 × 10⁶	1 × 10⁷	1 × 10⁸	1 × 10⁹
Day 1	0.00^aC	0.00^aD	0.00^aC	0.00^aC	0.00^aD	0.00^aD
Day 3	5.33^cC	9.33^bcD	13.33^bC	12.00^bC	24.67^aC	28.67^aC
Day 5	29.30^bB	27.18^bC	44.06^bB	68.82^aB	79.79^aB	81.08^aB
Day 7	33.36^cB	45.12^cB	66.18^bAB	88.24^abA	91.04^abA	91.08^aA
Day 9	57.82^bA	63.93^bA	77.30^abA	94.14^aA	96.36^aA	95.93^aA

Different superscript lowercase letters (a–c) within a line and capital letters (A–D) within a column indicate statistically significant differences between groups (p < 0.05)