TABLE 1.

Effects of Cyt1Aa alone and in combination with Cry protein preparations against larvae of diamondback moth and pink bollworm

Insect and resistance level	Cry prepn		% Mortality without Cyt1Aab	Effect of Cyt1Aa on mortality (%)c
	Type	Concna
Diamondback moth
Susceptible	Dipel	0	NAd	3.8
		0.256	27.2	−6.4
		1.28	36.0	5.2
Resistant	Dipel	0	NA	3.8
		25.6	4.9	0
		128	5.0	−2.6
		256	2.7	−2.7
		1,280	83.8	−16.2
Susceptible	HD-1	0.5	18.4	−10.5
		2.0	43.5	1.2
		5.0	65.8	−23.7
		20.0	81.6	15.8
Resistant	HD-1	20.0	15.3	−15.3
		50.0	5.3	−0.2
Pink bollworm
Susceptible	Cry1Ac	0	NA	0
		0.03	0	0
		0.1	7.4	0
Resistant	Cry1Ac	0	NA	6.8
		1.0	0	17.2
		10.0	20.7	0

^aDipel and HD-1 concentrations are given in milligrams per liter. Cry1Ac concentrations are given in micrograms per gram of diet. The concentrations of Cyt1Aa were 40 mg per liter with Dipel and 1.6 μg per g of diet. For tests with HD-1, the concentration of Cyt1Aa varied as the concentration of HD-1 varied (see text). 

^bMortality values were adjusted for control mortality values by using Abbott's correction. 

^cThe effect of Cyt1Aa on mortality was calculated as follows: percent mortality with Cyt1Aa − percent mortality without Cyt1Aa. Overall, adding Cyt1Aa did not significantly increase mortality for diamondback moth or pink bollworm (sign test, P > 0.05). 

^dNA, not applicable.