Table 2.

Demonstration of how codling moth male capture in a single pheromone-baited monitoring trap deployed in a Michigan apple orchard not under mating disruption can be translated into an estimate of percent apple infestation

Male codling moth caught per trap	Male codling moth per 21 haa	Female codling moth per 21 hab	Infested apples per 21 hac	% Infestationd
1	50	50	850	0.011
3	150	150	2,550	0.033
10	500	500	8,500	0.11
30	1,500	1,500	25,500	0.33
100	5,000	5,000	85,000	1.10

^a Male codling moth per trapping area of 21 ha equals catch divided by a T_fer of 0.02.

^b Codling moth sex ratio is 1:1.

^c Each codling moth female results in an estimated 17 infested apples.

^d The average number of apples per 21 ha of Michigan orchard is approximately 7.56 million. % Infestation equals (infested apples per 21 ha divided by 7.56 million) × 100.