In a note justification of accumulation of fosfororganichesky connections is given in grapes berries owing to non-compliance with the period of expectation after the first processing by an insecticide.
UDC 632
Fosfororganichesky connections also are successfully used long ago against wreckers of crops. Possessing high efficiency, they at the same time are unsafe for the person and environment and consequently demand especially careful address.
In 2004-2005 dynamics of residual quantities of a number of fosfororganichesky connections, in particular Bi-58n, ke was studied, at norm of an expense of 2 l/hectares after double processing. Tests were selected until residual quantities of a studied preparation didn’t cease to be found.
Bi-58 New – insektoakaricid system and contact action, it is highly toxic, cumulative properties are expressed poorly. Breaks up with formation of a toxic intermediate product – formotiona. The half-life period of initial connection in berries of grapes made 6 days (3,2¼ú/kg), the next 30 days its residual quantities weren’t found not allowed). The high maintenance of a metabolite is established for the 7th days, and complete disintegration – for the 30th days after processing.
Because processing against pincers and other wreckers repeat in 2 weeks, excess of MDU of toxic products in berries of grapes is connected with an incomplete detoxication of a preparation after the first processing.
(On magazine materials Protection and quarantine of plants).