Investigation possibilities of bio mineral foliar fertilizer Lactofol K/Ca and universal humus fertilizer Humustim for reducing tobacco infection with TMV and pesticide residues level

Hristo Bozukov

Abstract: The experiment was conducted in experimental field Markovo of TTPI in natural field conditions with Elenski 817 oriental variety in four repetitions. The triple treatments of plants are made in determine stage of its growth with bio mineral foliar fertilizer Lactofol K/Ca and universal humus fertilizer Humustim for reading fertilizers influence on plants infection with TMV. We introduced together with respective fertilizer as independently chlorpiriphos-metil (Reldan) or metalaxil+mankozeb (Metalaxan) for determine foliar fertilizers influence on reduction pesticide residues accumulation.
It is determined as result of investigation that:
– The tobacco treatment with Lactofol K/Ca decreases the plant damage of TMV about one quarter in comparison to control.
– The simultaneously introduction of chemicals containing chlorpiriphos-metil and EBDC with some of foliar fertilizers Lactofol K/Ca or Humustim reduces the content of pesticide residues in tobacco under limited permissible quantities.

Keywords: foliar fertilizer; pesticide residues; protection; TMV; tobacco

Date published: 2017-07-25