Field and Laboratory Evaluation of Pesticidal Plants for Bioactivity against Rape and Tomato Pests in Malawi

Table 2

Toxicity of methanol plant extracts (10% w/v) against T. evansi at 1, 12, and 24 h after application.

Plant extract	Mortality (%)
	1 h	12 h	24 h
T. vogelii	15.0^a	26.25^ab	45.0^ab
E. tirucalli	10.0^ab	20.0^abc	37.50^b
S. longepedunculata	10.0^ab	12.5^bc	35.0^b
A. indica	8.75^ab	21.25^ab	51.25^ab
S. incanum	8.75^ab	11.25^bc	45.0^ab
C. abbreviata	6.25^ab	17.5^abc	37.50^b
T. diversifolia	6.25^ab	11.25^bc	50.0^ab
B. madagascarensis	3.75^ab	25.0^ab	52.5^ab
D. kilimandscarichus	3.75^ab	30.0^a	60.0^a
V. amygdalina	3.75^ab	18.75^abc	43.75^ab
Methanol (control)	1.25^b	3.75^c	6.25^c
Mean	6.9	18.0	42.2
F value	2.117	4.041	10.164
Sig.	0.026	0.001	0.001

Means followed by the same letters are not significantly different at between treatments according to ANOVA and Student–Newman–Keuls test.