Species

Chemical

Concentration (C) in µg L-1

Time to 50% mortality (T50) in days

C x T50 product in µg L-1.days

n

Cypridopsis vidua

Imidacloprid

        4

    5.2

         20.8

4.67

 

 

      16

    3.0

         48

 

 

 

      64

    3.3

       211.2

 

 

 

    250

    2.3

       575

 

 

 

  1,000

    2.0

    2,000

 

 

 

  4,000

    0.9

    3,600

 

Daphnia magna

Imidacloprid

     250

384.7

  96,175

1.35

 

 

     750

  69.7

  52,275

 

 

 

  2,220

  18.6

  41,292

 

 

 

  6,700

  15.0

100,500

 

 

 

20,000

  18.4

368,000

 

 

 

60,000

    3.0

180,000

 

Gammarus pulex

Thiacloprid*

       99

  63.6

    6,296.4

1.11

 

 

     364

  16.7

    6,078.8

 

 

 

     988

    6.5

    6,422

 

 

 

  3,100

    3.2

    9,920

 

 

 

  9,520

    0.9

    8,568

 

Sympetrum striolatum

Thiacloprid*

         7.2

  20.6

       148.3

1.53

 

 

         8.0

  17.2

       137.6

 

 

 

       12.7

  13.0

       165.1

 

 

 

     113.3

    3.2

       362.6

 

*Original data from Beketov and Liess [30]
Table 2: Mortality of Arthropods Induced by Neonicotinoid Insecticides (After Sanchez-Bayo [29]). Data fit the equation C T50n.