tree pest造句

The chemicals used to keep the trees pest-free and healthy have shifted as well.
The yellow-bellied sapsucker, as a Christmas tree pest, is hosted by Scots and Austrian pine trees.
The dry white swabs, which suggest Q-Tips, are the egg masses of one of our newest and most worrisome tree pests.
Balsam twig aphids ( " Mindarus abietnus " ) are another type of tree pest which affects fir and spruce trees in the spring.
The insect threatens the entire North American genus " Fraxinus ", while past invasive tree pests have only threatened a single species within a genus.
It's difficult to find tree pest in a sentence. 用tree pest造句挺难的

In fact in many countries they are introduced in forests to control tree pests, such as swains jack pine sawfly and eastern tent caterpillars in North America.
Some species are tree pests in North America, including : European elm scale, azalea bark scale, oak eriococcin, crape myrtle bark scale, beech scale
One of the hallmarks of beech bark disease, separating it from other tree pests _ such as Dutch elm disease and the chestnut blight _ is that it works slowly.
The tree sparrow's consumption of insects has led to its use in agriculture to control fruit tree pests and the common asparagus beetle, " Crioceris aspergi ".
Sen . Slade Gorton, R-Wash ., added to the bill another $ 8 million to help complete the Lummi school and $ 1.2 million to fight pine tree pests on the Yakama reservation in his home state.