Mechanical control or simply picking insects off a leaf or pruning off a diseased branch.
Cultural control like thinning branches in a crabapple or lilac to increase air circulation around the foliage to control powdery mildew.
Mechanical control methods such as digging and pulling can be useful when dealing with small number of weeds. Hand pull or dig new or exotic weeds to prevent their spread. Mowing is another method of mechanical weed control.
Mechanical controls may mean hand picking insects or using a hoe to get rid of weeds. Some ways to mechanically control insects include using a hand vacuum on leaves and paying six-year-olds a quarter for each hornworm or dandelion they collect.
Mechanical controls like row covers, traps, barriers and handpicking insects that are beginning to congregate, can do much to slow or stop an infestation.
Mechanical Control. Hand-hoeing is still the best answer to weed control in the home orchard. Mechanical tillage equipment is satisfactory, but till only up to 2 inches deep to avoid serious damage to shallow feeder roots.
Before treating pests with chemical controls, try mechanical controls first. A sharp hoe is still the best weapon against weeds. Hand picking and disposal of insects is often sufficient for control.
Digging and hoeing areas where yarrow has spread can remove some of the rhizomes but mechanical control is only effective if it goes down 12 inches and removes every speck of yarrow weed.
"Personally, I think this is a situation where mechanical control is a much better technique than chemical control. Besides, in the process of pulling a few vines and roots, I burn more than a few calories." ...
 See also: Water, Plant, Growing, Light, Soil
  
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