. Cirtus fruits under irragation. Citrus fruits; Fruit-culture. 54 CITRUS TTMn^p tdot/-a -» J. xvyxN Wings, and antennae. The eggs hatch in about 10 days, and the larval and pupal stage occupy from 4 to 6 weeks. There is much overlapping of generations, and it has been estimated that as many as twelve generations a year may be produced. The insects feed during all stages of the life cycle. The remedy and its application for the greenhouse thrip is the same as for the citrus thrip. 50. Orange Tortrlx.—The orange tortrix is a gray moth about i inch long. The larva burrows
. Cirtus fruits under irragation. Citrus fruits; Fruit-culture. 54 CITRUS TTMn^p tdot/-a -» J. xvyxN Wings, and antennae. The eggs hatch in about 10 days, and the larval and pupal stage occupy from 4 to 6 weeks. There is much overlapping of generations, and it has been estimated that as many as twelve generations a year may be produced. The insects feed during all stages of the life cycle. The remedy and its application for the greenhouse thrip is the same as for the citrus thrip. 50. Orange Tortrlx.—The orange tortrix is a gray moth about i inch long. The larva burrows into the fruit, usually gomg no deeper than through the rind. The burrows not only mar the fruit but provide entrance places for molds, rots, etc. In early spring the lays about fifty cream-colored eggs, usually on the under side of the leaves, but sometimes on the fruit itself. The eggs are deposited in masses and overlap shingle fashion. In about 12 days the larvas hatch and begin feeding, on the fruit or foliage. At first they make several small burrows but later work on one burrow only. A thin network of silk is spun over the entrance. In about 2 months the larvas become full grown. They are then about ^ inch long and are from white to gray in color. During the develop- ing period, the larvas generally remain in the burrows, but on reaching maturity they emerge and seek a place for pupating. If a suitable place is not found, they will return to their bur- rows and pupate there. The pupal stage lasts from 9 to 12 days, when the insects emerge as moths. Investigations show that about three generations a year are. produced. The principal remedy for this insect is to destroy all dropped fruit in the groves and the culls from the packing houses while the larvas are still in the burrows. In case, however, a bad infestation occurs, spraying with an arsenical poison'at the time the larvas are feeding is advisable. 51. Aphids.—Several species of aphids, or plant lice, a
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