disbud

from The American Heritage® Dictionary of the English Language, 5th Edition.

• transitive verb To remove buds from (a plant) to promote better blooms from the remaining buds or control the shape of the plant.
• transitive verb To prevent the growth of horns on (livestock) by destroying or removing newly developing horns.

from The Century Dictionary.

• To deprive of buds or shoots; remove the unnecessary buds of, as a tree or vine.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb (Hort.) To deprive of buds or shoots, as for training, or economizing the vital strength of a tree.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb horticulture To remove buds from a plant in order to promote growth and health in the remaining buds.
• verb veterinary To remove horn-buds from a young calf, lamb or goat kid, to prevent growth of horns.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb destroy undeveloped horn buds (of cattle)
• verb thin out buds to improve the quality of the remaining flowers