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Scouting Citrus for Pests - Page 34
Most grasshoppers that feed on citrus have relatively short antennae and lay their eggs in the ground. There are four nymphal stages, the last of which is more damaging than the adult, sometimes causing defoliation of young trees, damaging bark and fruit. Nymphs of the Eastern lubber grasshopper (Romalea microptera) are black with yellow markings. Adults also have red markings; are large and heavy with small wings and cannot fly. The American grasshopper (Schistocerca americana) is light brown with black markings, smaller than the lubber with adults that fly. Katydids have long, hair-like antennae and wings resembling leaves. With the long blade-like ovipositor the flattened eggs are inserted into leaf margins by the female. Bush crickets
live above the ground in vegetation and may damage fruit.
Scout margins and weedy areas especially. Disk or mow in weeds before grasshopper have time to develop. However, mowing weeds which already have grasshoppers in them could force them onto trees. Spot treatments with insecticides may be necessary to control localized populations.
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