-20- 



visual traps; net sweeps; and captures of moths by an aspirator immediately after landing. 

 These results are presented in Figure 2. All three methods indicated that the AM flights 

 were virtually all made by males, whereas the PM flights were made predominantly 

 by female moths. 



We found the same general pattern of activity to occur on non-host trees adjacent 

 to orchards, but far fewer ABLM and no ovipositions were observed there. 



In summary, then, our study indicates that at least during the second and third 

 generations, male ABLM moths fly from first light to approximately 9-10 AM, probably 

 searching for females to mate. Virtually all mating occurs during this time. This strategy 

 may be designed to minimize wind disruption of sex pheromone trails emitted by females, 

 by taking advantage of the lower wind speeds usually associated with this time of day. 



From mid-morning to approximately 5 PM, ABLM adults are largely inactive and 

 are located in relatively concealed and shaded areas, possibly to avoid desiccation and 

 predation. In the evening, females are in flight, probably foraging for ovipostion sites. 



On the basis of our results, we recommend that insecticide applications for adult 

 ABLM be timed to coincide with the evening flight period. This will maximize both 

 the effectiveness of any fumigant action and contact of females with fresh insecticide. 

 This season we plan to investigate the effect of temperature on oviposition rates, and 

 to extend our observations to the overwintering generation of adults. 



I 



