OBSERVATION OF THE ATTACK CAUSED BY THE LARVAE OF DIABROTICA VIRGIFERA VIRGIFERA, UNDER THE DIFERENT TILAGE IN CORN CROPS OF NEAMŢ COUNTY, UNDER CONDITIONS OF 2020

Plesescu (Enache) Mariana, Tălmaciu Mihai, Tălmaciu Nela, Herea Monica

Abstract


In the current context, of banning neonicotinoids triatments, tillage systems and crop rotation are vrey important rings in controlling larval attack. The samples was collected in the corn crop from Ghigoiesti stationary, Neamt County. .

The period of observation, harvest samples was carried out between May and August 2020, by taking over biological material represented by corn roots, that have been brought into the laboratory for examination and processing the data obtained. From the collected biological material, the Diabrotica virgifera virgifera specimens that have been determined and centralized have been retained. 

 The material was harvested on the three variants represented by no tillage (V1), minimum tillage  (V2) and conventional tillage (V3). All three varians are planting in soil tratament with Force G 1.5.

Folloing the collection of samples and after analises, during the period of observation, were had colected a number of 1239 specimens of larvae of Diabrotica virgifera virgifera. And  after centralization at variant 1 we totaled 457 specimens, at variant 2 we totaled 418 secimens and at variant 3 we totaled 364 specimens.


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