ホテイアオイ
Caterpillars of the salvinia stem-borer moth feed on several aquatic plants, primarily "Azolla caroliniana" (water velvet), "Pistia stratiotes" (water lettuce), "Salvinia rotundifolia" (water fern), "Salvinia molesta" (a water fern), and occasionally "Eichhornia crassipes" (water hyacinth). Feeding by colonies of larvae often leads to intensive damage and plant death after two or three weeks of feeding. Larvae eat by boring into plant stems or feeding externally on leaves.