SUCCESSFUL TECHNOLOGIES
In the first days of spring, when the average daily air temperature is +6 to +9 °C, the wintering rape stalk garganey (Ceutorhynchus napi) and cabbage stalk garganey (Ceutorhynchus pallidactylus) begin to emerge from their overwintering sites.
These are very dangerous pests of oilseed rape! The main damage is caused by larvae that consume the pith of the oilseed rape stem.
A stable average daily air temperature of +6 °C signals the placement of yellow-cup traps in oilseed rape fields. These pests emerge when there is a minimum temperature of +6 °C at a depth of 2 cm in the soil, but the attack period will start when the temperature is around +9...+12 °C.
In order to correctly monitor the appearance of this pest it is necessary to use traps!
The traps are placed 20-30 m from the edge of the field, on the side of the forest belts.
Catching 10 adult pests in the trap within three days indicates that the pest threshold is exceeded.
From the time the threshold is exceeded until the time oviposition starts, there are 9-10 days to treat the crop with insecticides.
The most optimal means of pest control would be to use insecticides from the group of synthetic pyrethroids: Braik, ME (0.1 l/ha) and Sămpai, EC (0.3-0.4 l/ha).
The main advantages of these products are their strong and fast control effect, high efficiency at low temperatures and low cost.
Warning! Once the larva has entered the stem, it is practically impossible to control!