Interactions between Bt-expressing tomato and non-target insects: the aphid Macrosiphum euphorbiae and its natural enemies

Figures & data

Figure 1.  Survival curves for Macrosiphum euphorbiae on conventional (UC82, dots) and Bt tomato plants (UC82Bt, triangles).

Table 1. Life history traits of the aphid Macrosiphum euphorbiae (Thomas) reared on conventional (UC82, n=54) and Bt tomato (UC82Bt, n=54).

	UC82	UC82Bt	t	p
λ (female/female/day)	1.91±0.62	1.90±0.71	0.07	0.94
Pre-reproductive period (days)	13.26±6.29	13.07±7.41	0.14	0.89
Reproductive period (days)	13.96±10.64	12.46±11.73	0.69	0.49
Longevity (days)	31.46±11.67	31.28±13.63	0.08	0.94
Doubling time (days)	5.33	5.69
Generation (days) T	23.28	23.52
rm	0.13	0.12
Note: Mean values±standard deviation.

Figure 2.  Percentage of landings on the target by A. ervi toward conventional (UC82) and Bt (UC82 Bt) tomato plants not infested by aphids.