Provided herein are compositions, systems, and methods for suppressing a population of insects such as flies. Some embodiments relate to compositions comprising a fermented biomass, a dye and a particulate matter. Some embodiments relate to systems and methods for use of the compositions described herein. The compositions are biodegradable, non-toxic, and environmentally friendly.

Disclosed are methods and devices that are useful for limiting plant growth using microwaves without the use of chemical agents such as herbicides and, in some embodiments, are thereby useful for weed control. Disclosed are also methods and devices that are useful for injuring and/or killing arthropods using microwaves without the use of chemical agents such as pesticides and, in some embodiments, are thereby useful for the control of arthropod infestation.

An anti-pest device for fruit trees and the like that prevents trees from being affected by crawling insect pests includes a rectangular sheet of electrical insulating material, which can adopt the shape of an inverted truncated cone or a cylindrical configuration around the trunk of the tree; a band of low-density foam under the sheet that adapts to the physiognomy of the bark, and deforms with the growth of the trunk, whereas the sheet includes a sector that is superimposed thereon and slides on it to adapt to said growth; a pair of parallel conducting wires, separated a distance according to the size of the body of the insect to be exterminated, subjected to a high difference in electrical potential by means of a power supply circuit, such that when an insect tries to get past them, it is automatically electrocuted.

A device (10) for trapping and killing marine organisms (14) such as animal plankton, salmon lice and other parasites, comprises a body (12; 12′) configured for submersion in water (15). The body (12; 12′) comprises at least one light source (16) configured and controlled for attracting said marine organisms, and an internal cavity (20) having an opening (20′) for fluid communication with at least a portion of the water. The light sources (16) are arranged inside the cavity (20) and arranged and controlled to emit light waves through said opening and into at least a portion of the water. At least one positive electrode (24; 24′; 24″; 32) is arranged in the cavity and electrically connected to a low-voltage power source (26; 27; 30), and at least one negative electrode (15a) is arranged in the water and electrically connected to said power source (26; 27; 30). The invented device generates, by means of electrolysis with the water (15), chlorine gas (21) at or in a region near the at least one positive electrode, and the chlorine gas (21) reacts with water inside the cavity to form hypochloric acid and hydrochloric acid (31).

Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for a calibration target for ultrasonic removal of ectoparasites from fish. In some implementations, the calibration target includes a fish-shaped structure, sensors positioned at different locations of the fish-shaped structure, a processor that receives sensor values from the sensors, and a transmitter that outputs sensor data from the calibration target based on the sensor values.

A solar powered lighting element with a simulated flame and an electric insect eliminator includes a lighting portion with a conducting grid and a light portion that simulates a flickering flame which are powered by a rechargeable battery that is recharged using a solar panel. One or more UV light elements are provided in addition to the flickering flame to attract insects.

A solar powered lighting element with a simulated flame and an electric insect eliminator includes a lighting portion with a conducting grid and a light portion that simulates a flickering flame which are powered by a rechargeable battery that is recharged using a solar panel. One or more UV light elements are provided in addition to the flickering flame to attract insects.

An electrifiable projectile for an insect zapper gun is capable of killing a target insect at a distance from the user. The projectile includes a pattern of electric wires forming a front-facing conductive contact structure having a breadth sufficient to allow the projectile to intercept an insect when propelled in a forward trajectory toward an insect. When the projectile's pattern of electric wires comes into contact with the target insect, an electric charge on the projectile is transmitted to the insect rendering the insect deceased.

An insect zapper device comprises a zapper element and a cleaning element. The zapper element comprises a base portion, a plastic housing on the base portion, electric coils on the plastic housing, and a power source to deliver energy to the electric coils. The cleaning element has a plurality of brushes and is slidable with respect to the zapper element to transport the plurality of brushes along the electric coils to dislodge dead insects.

An apparatus for controlling plant pests includes a portable case and a light source held in the case. The light source emits ultraviolet light in a predetermined direction. The case includes an installation assembly configured to be installed in a culture medium of the plant so that the predetermined direction is upward. An optical component that removes a wavelength component larger than 340 nm from the ultraviolet light emitted by the light source may also be provided.