TABLE 2.

Toxicity of orally administered concentrated culture broths of P. luminescens for newly molted fourth-instar M. sexta larvae

Samplea	Fold concentrated	% Mortalityb	Initial wt (g) ± SE	Final wt (g) ± SE	Fold weight gainb
Control (PP3-Tween)		0	0.20 ± 0.01	2.00 ± 0.18	10
Strain Hm	15	0	0.22 ± 0.02	0.63 ± 0.04	2.8
Strain Hb	25	0	0.23 ± 0.01	0.57 ± 0.13	2.4
Strain NC-19	15	0	0.19 ± 0.01	1.36 ± 0.06	7.2
Strain W-14	10	0	0.14 ± 0.01	0.22 ± 0.04	1.5
W-14 HPLC toxin (5 μg)		30	0.17 ± 0.01	0.16 ± 0.01	0.9

^aA 50-μl sample was applied to 1 cm² of insect diet; n = 10 larvae for each sample group. 

^bAt 4 days posttreatment.