DYNAMICS OF THE APPEARANCE THE DIABROTICA VIRGIFERA VIRGIFERA, IN THE CORN CROPS OF NEAMŢ COUNTY, UNDER THE CONDITIONS OF 2020 IN DIFFEREND TILLAGE SYSTEM

PLESESCU (ENACHE) MARIANA, TALMACIU MIHAI, TALMACIU NELA, HEREA MONICA

Abstract


In order to establish the optimal moment of carrying out the treatments for the control of the adults, the dynamics of the appearance for Diabrotica virgifera virgifera is very important step in warning of treatments and their effectiveness.

The research was carried out, in the corn cultivars from Neamt County. The biological material collected using sticky yellow traps during the year 2020 from June to September.

The experience and randomization were organized according to the mode of protection of culture and according to the treatment applied, and thus resulted in three variants as follows three variants : variant 1 - no tillage work system, variant 2, minimum tillage work system and variant 3 , conventional tillage work system. In all variants the soil have was treated with granulated FORCE G 1.5 insecticide, active ingredient 1.5%, (Syngenta) at a dose of 15 kg ha.

During the entire period of observation, a total of 5810 adult specimens of Diabrotica virgifera virgifera were collected, where the first alert of the adult was made on 15  June, and its last registration was on 15 September.


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