The present application is directed to a system and device for attraction of pests. This system comprises CO.sub.2-releasing microorganisms, and also nutrients specific to these microorganisms, and this system, or the device, comprises one or more biodegradable biopolymers and allows CO.sub.2, and optionally other attractants, to be released over a period of more than 20 days. Furthermore, the present application provides for the use of such a system or such a device for the attraction of pests, more particularly of maize or potato pests, such as larvae of the Western corn rootworm or wire worm. The present application is also directed, lastly, to methods for attracting pests, more particularly pests of maize or potatoes, such as the larvae of the Western corn rootworm, or for wire worms, with the systems or devices of the invention being positioned in the immediate vicinity of the plants, but preferably not directly on the plants.

Devices and methods for the control of pests using the vapors of a pesticidal composition. Compostions, devices and methods for the selective control of pests while not harming one or more beneficial insects are also disclosed. In some embodiments, the pests are bed bugs, fleas, lice, ticks, or the like. In some embodiments, the pests are varroa mites and the beneficial insects are honey bees.

In order to effectively apply semiochemical treatment products, a computer-implemented method is provided for generating an application scheme for a semiochemical treatment for controlling a harmful organism on an agricultural field using a mobile treatment device comprising at least one dispenser, the method comprising: a) providing information about an expected presence of the harmful organism for an upcoming period; b) providing, based on the expected presence of the harmful organism, a planned application timing of applying the semiochemical treatment for treating the harmful organism on the agricultural field; c) providing product data relating to a semiochemical product capable of targeting the harmful organism; d) providing, at least one of field data or environmental data at the planned application timing, wherein the field data is indicative of a field condition at the planned application timing and/or the environmental data is indicative of an environmental condition at the planned application timing; e) determining, based on the product data and the at least one of field data or the environmental data at the planned application timing, a minimum concentration of the semiochemical product for affecting a behaviour of the harmful organism; f) determining, based on the minimum concentration of the semiochemical product, a dose rate of the selected semiochemical product to be spread by the at least one dispenser into an atmospheric vapour forming a cloud which envelops crops on the agricultural field; and g) generating the application scheme based on the determined dose rate.

Tarpless fumigation and powered aeration of containerized cargo within a shipping container are disclosed. A portable fumigation containment door is installed in covering relation with main rear opening of a standard cargo container. The door is adapted with a fumigant diffuser for dispersing fumigant within the container. A recirculating fan disperses and circulates fumigant within the shipping container. Powered aeration is used to aerate the container through ports in the containment door by drawing fumigant laden air from the container while drawing in ambient air, while the container refrigeration unit is used to maintain a desired temperature.