FI74191B - FOERFARANDE FOER SKYDDANDE AV NYTTOVAEXTER. TRANSFERRED PAEIVAEMAEAERAE-FOERSKJUTET DATUM PL 14 ç 13.12.85. - Google Patents

Description

|: 1 74191

METHOD FOR PROTECTING CROPS - FÖRFARANDE FÖR SKYDDANDE AV NYTTOVÄXTER

The invention relates to a method for protecting useful plants.

Various plants grown in rows, such as e.g.

5 Various insects are a problem in the cultivation of currants, currants, raspberries, grapes and similar useful plants. Pests destroy plants or berries or fruits derived from plants, but other insects that end up in a collection container are also a problem when picked up by a machine. Insects can be controlled with poisons, but the toxins also easily affect the beneficial plants and their berries and fruits. In addition, no toxins can be used at the time of flowering or at a specified time before picking.

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The object of the invention is to provide a method for the protection of useful plants, by means of which method the drawbacks associated with the currently known methods are eliminated. In particular, it is an object of the invention to provide a method by which insects can be removed without damaging useful plants and without the introduction of harmful additives into their berries, fruits or the like. It is a further object of the invention to provide a method which is simple and easy to use.

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The object of the invention is achieved by a method which is mainly characterized by the features set out in the claims.

In the method according to the invention, the plants are irradiated with microwaves. Microwaves effectively affect insects in plants, effectively destroying them. Insects are preferably killed from plants according to the invention by irradiating the plants with low power microwave radiation. The power of the microwave radiation is then chosen so that it harms insects, but the plants remain unharmed.

5 In the method, the plant areas are treated with a microwave radiation device connected to a working machine, such as a tractor. The implement is transported between rows of useful crops so that microwaves hit the plants in the rows mainly efficiently. The irradiation device 10 can be such that it is possible to irradiate several rows simultaneously at the same time. The radiation device is arranged so that the low-power radiation is directed at the useful plants from above and / or from the sides.

The method according to the invention will now be described in more detail with reference to the accompanying drawing, in which Figure 1 shows a side view of an applied radiation device attached to a working machine, Figure 2 shows the device of Figure 1 from above and Figure 3 shows the device of Figure 1 from behind.

The radiating device shown in Figures 1-3 comprises a base 2 removably attached to the working machine 1, a radiation source 3 placed on the base 25, which emits microwaves, and a generator 4 acting as a power source. Figure 2 shows the use of the three substrates and the radiation sources on the substrates. In the illustrated embodiment, the middle tray is removable and the other trays are movable relative to each other as shown in Figure 3. The platforms are located behind the implement, in this case the tractor, and are provided with wheels 6 on which they are moved. 35 The microwave power can be adjusted within the desired limits, in which case the maximum power is, for example, 5 kW / unit.

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