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Scouting Citrus for Pests - Page 17
Selenisa sueroides is a native moth whose larvae feed on legumenous weeds, particularly Aeschynomene but also Sesbania and phasey bean. In late summer or early fall, mature caterpillars move off host plants seeking hollow stems in which to pupate. The vertical “spaghetti” tubing of microsprinklers is an acceptable substitute, and the caterpillars are capable of boring through the tough, polyethylene wall. The resulting hole is about 3/8 inch in diameter and almost perfectly round, in contrast to irregularly shaped rodent damage. The larva pupates inside the tube but is jammed up against the emitter when the water is turned on. The best control is to keep legumenous weeds mowed to avoid population buildup.
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