Crotch angle: The angle formed where a tree branch joins the trunk. Narrow crotch angles are weak and easily damaged. The strongest crotch angle is 90 degrees.
Faqs ...
crotch angle The angle formed between a trunk and a main scaffold limb. The strongest angle is 45° to 60°.
If removal of a "V" crotch will destroy the shape of the tree, you can leave it in and add artificial support, using cables and hooks. This is a permanent installation.
Birds love: Its crotches provide a place for birds to build their nests, while bright-red berries provide nourishment in fall.
Height: 20 to 30 feet.
Width: 20 to 30 feet.
Two of the most common sites of canker initiation are narrow-angled branch crotches (subject to winter injury and breakage) and the weak twigs that develop within tree centers.
Early summer: The most vigorous shoots, arising from the top two or three buds, will have narrow crotch angles, so cut these shoots back to stubs with just three to five leaves.
Tomato suckers, or side shoots, are the growth that appears in the crotch between the stem and a branch. If left to grow, they will become another main stem with branches, flowers, fruit and more suckers of their own.
Only those with branches that cross or rub against each other, causing wounds that are entry points for disease; those with very acute crotch angles (which tend to split in storms), or trees in which you wish to eliminate low-hanging branches, ...
Crotch (where leader and side branch meet. Ideal angle is between 30 and 70 degrees.
Suckers or Watersprouts
....Grow from roots, leader or side branches.
Spurs
....Short fruit bearing laterals.
Hangers
....Drooping branches.
Whorls
..
The branch bark ridge on trees is a line of rough bark running from the branch-trunk crotch into the trunk bark. It is less prominent on some trees than on others.
Infested branches typically break at the crotch, where they join the trunk. The first external sign of injury is the production of popcorn-like pitch masses at wound sites.
Caterpillars spin a silken tent in the crotches and forks of tree branches. They leave these nests during the day to feed on foliage. Entire branches and large portions of severely infested trees may be defoliated.
Control: ...
As with the young apple trees, it is necessary to select 3 to 5 lower scaffold branches with good crotch angles and spaced around the tree. Limbs with poor angles, and excess scaffold limbs, should be removed at their base.
It can develop weak crotch angles and fairly weak wood. It also tends to drop a fair amount of litter in the form of small branches. But all things considered, I still think it's a tree worth growing.
Sew crotch seam.
Sew pant inseams.
Sew side seams for pant or skirt.
Apply waistband or insert elastic into waistband.
Hang pants overnight using a pant hanger.
Turn up hem. Sew hem as desired.
Description
Very small, oval-shaped white bugs. Egg sacs appear as a white, waxy fuzz along the stems and crotches of branches.
Where they live
Across the United States.
There should only be one main trunk per tree. If there is a secondary trunk, where the two meet (the crotch) will weaken and the tree may split. The split is an excellent place for insect infestation.
The central leader system consists of a central trunk around which scaffolds (primarily side branches) of the desired number and spacing can be arranged with wide-angle crotches.
But for sheer mass, the king is Grammatophyllum speciosum; native to Southeast Asia, it perches in the crotches of large trees and produces growths up to 20 feet long and clumps weighing over two tons.
Select 4 or 5 strong side branches that are evenly distributed around the trunk about 8 in. apart, with the lowest about 18 in. from the ground. These will be your future scaffold limbs. Avoid branches with narrow crotches.
If a pollarded tree is not pruned every year, the shoots grow and expand, pushing against each other. Eventually the tree will develop weak crotch angles and moisture will enter the wood. The tree will begin to rot and fall apart.
 See also: Branch, Plant, Pruning, Spring, Trunk
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