The MINA plan 3+ (2008-2010) anticipated a reduction of 50 % in 2010 with respect to 1990. The MINA plan 4 (2010-2015) envisages a further decrease in the period 2010-2015.
In 2010, the indicator value was more than 60 % lower than in 1990. The MINA plan 3+ (2008-2010) target was thereby achieved.
The pressure on aquatic life has decreased more than the total use of crop protection agents. In addition to the causes that explain the change in total use (see Use of crop protection agents), there is of course the federal policy which is aimed at taking the most toxic substances out of circulation. In the decrease from 2001 to 2002, for example, the banning of lindane (an insecticide) played a major role. Also the phasing-out of diuron (a herbicide) has had a noticeable effect on the total indicator value. The decrease from 2007 to 2008 has a lot to do with the banning of paraquat (a herbicide). The decrease in 2010 is to be attributed mainly to a decrease in the use of flufenoxuron (an insecticide) and fenoxycarb (an insecticide).
The total Seq value is determined mainly by a limited number of active substances. In 2010, three substances accounted for more than half of the total: flufenoxuron (25 %), aclonifen (an insecticide, 16 %) and chlorpyrifos (an insecticide, 14 %). In 2010, the contribution of horticulture, arable farming and non-agriculture to the pressure on aquatic life amounted to 59 %, 35 % and 6 % respectively.
In spite of the short period over which Seq+ was determined, a marked decrease appears to have already taken place between 2009 and 2011. This decrease can be attributed mainly to the sharp decline in the use of endosulfan, an insecticide whose use has in fact been banned since June 2007. In 2011, agriculture accounted for almost 96 % of the total Seq+. The Seq+ of horticulture exceeds that of arable farming by a factor of almost 3. The contribution of non-agriculture was almost 4 %.