Smaller fruit tortrix moth

Fig. 5. 39. Life cycle of smaller fruit tortrix moth.

NATURE OF DAMAGE. The Smaller fruit tortrix makes a distinct spiral tunnel at the point of entry into the fruit (in the case of the codling moth the spiral path is much less distinct). The tunnel passes above the core, so the pips are not eaten. The tunnels do not contain frass, and the dry frass hangs threadlike out of the entry hole. 

The suggestion that the sex pheromone composition of the oak leaf roller was dependent to a large extent on diet was made 82,475,476) and refuted 477, 478). It is now generally accepted that the sex pheromone of this tortricid moth species is a specific blend (67 33) of E)- - and (Z)-ll-tetradecenyl acetates 477). It is also accepted that in this species this ratio is not influenced by diet 478). However, the effects of diet on the amount of pheromonal compounds have been suggested for the summer fruit tortrix moth 479), the gypsy moth 480) and the smaller tea tortrix moth 481). 

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