TABLE 2.

Dose-mortality and time-mortality tests in third-instar T. ni larvae^a

Virus	LD50 (no. of PIBs/larva)			LT50 (h)
	Value for the group	95% fiducial limit		Value for the group	95% fiducial limit
		Lower	Upper		Upper	Lower
NC	2.59 × 103	1.98 × 103	3.20 × 103	103.7	110.9	96.5
WT	2.31 × 103	1.76 × 103	2.86 × 103	101.8	109.4	94.3
1×	2.42 × 103	1.95 × 103	2.89 × 103	91.7	97.5	85.9
2×	2.23 × 103	1.67 × 103	2.79 × 103	77.3	86.2	68.4
4×	2.88 × 103	2.47 × 103	3.29 × 103	82.2	90.1	74.3
8×	2.63 × 103	2.09 × 103	3.17 × 103	96.9	104.7	89.1

^aTwenty-four larvae were used per treatment group, and the experiments were repeated three times. The data were analyzed using the Kaplan-Meier estimator. The extremely shortened LT₅₀ values for the 2× and 4× viruses are underlined.