psylla

How to use psylla in a sentence

• The name of the plant louse that infests pear trees is the pear-tree psylla.

  The Insect Folk | Margaret Warner Morley

• The psylla, while irregular in its outbreaks, is most damaging and hard to control when it appears.

  The Pears of New York | U. P. Hedrick

• Kieffer and related hybrids are somewhat immune to San Jose scale, but are very susceptible to psylla.

  The Pears of New York | U. P. Hedrick

• Other pests, as psylla, the scab-fungus, and codling-moth beset the pear and make profits uncertain.

  The Pears of New York | U. P. Hedrick

• The psylla is a minute, sucking insect, wingless in its immature stages, but winged and very active as an adult.

  The Pears of New York | U. P. Hedrick