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A smudge pot (also known as a choofa or orchard heater) is an oil-burning device used to prevent frost on fruit trees. Usually a smudge pot has a large round base with a chimney coming out of the middle of the base. The smudge pot is placed between trees in an orchard. The burning oil creates heat, smoke, carbon dioxide, and water vapor.
A backflow prevention device is used to protect potable water supplies from contamination or pollution due to backflow. In water distribution systems, water is normally maintained at a significant pressure to enable water to flow from the tap, shower, or other fixture. Water pressure may fail or be reduced when a water main bursts, pipes freeze ...
The temperature at which an insect spontaneously freezes is referred to as the supercooling point (SCP). For freeze-avoidant insects, the SCP is thought to be equivalent to the lower lethal temperature (LLT) of the organism. [11] The freezing process is usually initiated extracellularly in the gut, tissues, or hemolymph. In order to supercool ...
A reduced pressure zone device (RPZD, RPZ, or RPZ valve) is a type of backflow prevention device used to protect water supplies from contamination. RPZDs may also be known as reduced pressure principle (RP), reduced pressure principle backflow prevention devices , [ 1 ] [ 2 ] reduced pressure zone assemblies (RPZA), [ 3 ] or reduced pressure ...
The Hibiscus Harlequin Bug. Lagunaria is fed upon by Hibiscus Harlequin Bug. [27] The females are known to deposit their eggs around the bases of the stems. [28] The insects feed on the leaves, flowers fruit and seeds and suck the sap from the stems. [28] [29] They rarely cause significant damage to the plant. [29]
It is usually constructed of brass and resembles a 90-degree elbow with a hood on its top to allow air to enter the water system if a siphon attempts to form. Inside this elbow is a poppet valve that is held "up" by the water pressure found in the system, closing the air entrance to the device. If the pressure in the "upstream side" is reduced ...