' ' the spring.Physiological conditions of the host plant allowing gall formation may change as the season advances.The largest sucker shoot gall found was 6.4 mm. in diameter.Of the 106 sucker shoot galls found July 23, 1969, 50% contained larvae of P. pirata and 94% of these galls had no inner chamber development.Mean size of these 53 galls was 4.6 mm.(S.D. = 1.0), significantly smaller than the mean of 8.1 (S.D. = 1.6) for spring initiated galls (Fig. 25).B) Gall Developmental Morphology a)
No takes yet. Share an insight, caveat, or question.
Joseph D. Shorthouse (1970) studied this question.