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Canopy of D. aromatica at the Forest Research Institute Malaysia displaying crown shyness Trees at Plaza San Martín (Buenos Aires), Argentina. Crown shyness (also canopy disengagement, [1] canopy shyness, [2] or inter-crown spacing [3]) is a phenomenon observed in some tree species, in which the crowns of fully stocked trees do not touch each other, forming a canopy with channel-like gaps.
A parapet is a barrier that is an upward extension of a wall at the edge of a roof, [1] terrace, balcony, walkway or other structure. The word comes ultimately from the Italian parapetto ( parare 'to cover/defend' and petto 'chest/breast').
An animal repellent consists of any object or method made with the intention of keeping animals away from personal items as well as food, plants or yourself. Plants and other living organisms naturally possess a special ability to emit chemicals known as semiochemicals as a way to defend themselves from predators.
[2] Manually operated laser torches and automated laser bird deterrent robots that move the laser automatically towards the birds are available on the market. Research conducted at Wageningen University [3] shows the potential of laser technology to prevent the spreading of Avian Influenza. When the laser was used at a poultry farm, a 99.7% ...
Bird control or bird abatement involves the methods to eliminate or deter pest birds from landing, roosting and nesting. Bird control is important because pest birds can create health-related problems through their feces, including histoplasmosis, cryptococcosis, and psittacosis. [1] Bird droppings may also cause damage to property and equipment.
Electronic pest control is the name given to any of several types of electrically powered devices designed to repel or eliminate pests, usually rodents or insects. Since these devices are not regulated under the Federal Insecticide, Fungicide, and Rodenticide Act in the United States, the EPA does not require the same kind of efficacy testing that it does for chemical pesticides.
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