. Cirtus fruits under irragation. Citrus fruits; Fruit-culture. enlarged. The ridges are very noticeable. Those eggs with holes in have hatched. Under a microscope they are seen to be not smooth like those of the common citrus species, but reticulated or covered with a fine network of raised ridges. Fig. 14 shows eggs of the cloudy white fly natural size deposited on an orange leaf. The larva is very similar to that of the common citrus white fly but the pupa is larger and thinner, and the pupa case col- lapses completely after the emergency of the adult. Not only does the cloudy-winged white
. Cirtus fruits under irragation. Citrus fruits; Fruit-culture. enlarged. The ridges are very noticeable. Those eggs with holes in have hatched. Under a microscope they are seen to be not smooth like those of the common citrus species, but reticulated or covered with a fine network of raised ridges. Fig. 14 shows eggs of the cloudy white fly natural size deposited on an orange leaf. The larva is very similar to that of the common citrus white fly but the pupa is larger and thinner, and the pupa case col- lapses completely after the emergency of the adult. Not only does the cloudy-winged white fly look much like the common citrus white fly in general appearance, but the life history is very similar, except that the broods are from 2 weeks to a month later and there is no winter brood. The nat- ural enemies also are about the same, except that there is in addition to the para- sites of the common citrus white fly, a yellow fungus. This fungus is very similar to the red fungus except for the deep yellow color. The white-fringed fungus also attacks this species of white fly more severely than it does Fig. 13 the common citrus white fly. 14. Control is the same in principle as that practiced for the common white fly. At the beginning of the rainy season in June parasitic fungus is spread on the trees, and in addition, if necessary, two sprayings with some one of the heavy oils are given. Since the larvas of the cloudy-winged white fly hatch about 2 weeks later than those of the common white fly, these sprayings may be done later, but the rule for spraying is the same; that is, it should be done 2 weeks after the bulk of the adults have disappeared. This will be November for the fall brood and late April or in May for the spring §28 UlrKU^ l^RUlTvS IN GULF-COAST STATES 15 Over a large part of its area of distribution, the cloudy- winged white fly occurs mixed with the common citrus white fly. As was said before, the eggs of the cloudy-winged white fly hatch about
Size: 1461px × 1711px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjectcitrusfruits, booksubjectfruitcultur
