THE MONTHLY BULLETIN. 



303 



rains, and it is considered best to introduce some of the fungi at that time. The 

 best time of all is the fall period, beginning in September or October, since the trees, 

 if thoroughly sprayed then, will remain free through the rest of the fall and winter. 

 In fact, the fall spraying will generally be found sufficient, especially if one or all 



Fig. 103. — Eggshells, first and second stage larva?, of woolly whitefly. Note 

 openings from which the young escape. White dots on first stage larva? are 

 spines. Highly magnified. (Courtesy Florida Experiment Station, Bui. 126.) 



Fig. 104. — Woolly whitefly on citrus leaf. Slightly smaller than natural 

 size. Note the circles of eggs. (Courtesy Florida Exp. Station, Bui. 126.) 



of the fungi have been present during the summer, and provided there are no 

 untreated groves near-by from which the whitefly can spread. Spraying may, and 

 frequently is, carried on all winter, but it is best to spray early in fall and rid the 

 trees of the insects for a longer period, there being no regular winter brood. 



