The worst pest of the hibiscus is the hibiscus flower beetle, which feeds on the unopened and developing flower bud. Healthy plants will detect the hibiscus beetle and drop the damaged flower buds, so if you notice flowers falling prematurely it can usually be taken as a sign of the beetleβs presence. Control hibiscus beetle and aphids on hibiscus with Searles Conguard spray.
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Various citrus mites can be the cause of deformed flowers, deformed leaves, distorted fruit, grey …