Arboriculture Terms

insect or other pest problem that develops on a plant stressed and weakened by another factor (see secondary disorder).

increase in a secondary pest population following a reduction in the population of natural predators or parasites.

hook and blade or scissors-type hand pruning tool intended for cutting single. small diameter stems. Also called pruning shears. bypass pruners. or hand pruners (contrast with anvil-type pruning tool and hand pruning shears).