Insect that travels in vast swarms, stripping large areas of vegetation

On reflection, butter cat up to get rodent6 Obtain by sponging5 The 23rd president of the United States16 South American rodent5 Cool dish and ceramic plate's back requires spraying8 Melina ___ , Greek actress and singer who became the country's first female Minister for Culture in 19818 Sequence of hereditary rulers7 Whole of hospital department having extremely deficient siren6