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 3 Efficacy of Purpureocillium lilacinum PL1 and fenobucarb on the management of Bemisia tabaci nymphs in cassava field after 2 spraying batches 7 days after treatments

Treatments	Before treatment	1st treatment		2nd treatment
Treatments	Number of Bemisia tabaci nymphs/leaf	Number of B. tabaci nymphs/leaf	Percentage of nymph reduction (%)	Number of B. tabaci nymphs/leaf	Percentage of nymph reduction (%)
Untreated	5.94 ± 1.85^a	6.98 ± 2.03^a	–	13.20 ± 4.50^a	–
Purpureocillium lilacinum PL1	5.53 ± 2.62^a	1.21 ± 0.28^c	77.46^a	2.27 ± 0.38^c	78.86^a
Fenobucarb	6.12 ± 1.64^a	3.03 ± 1.05^b	56.08^b	6.57 ± 1.69^b	50.27^b

Different superscript letters (a–c) within a column indicate statistically significant differences between groups (p < 0.05)