Table 3.5.   Percentages of cereal tillers with Aphididae. The insecticide applications are included in the table. In 2000 and 2001 the cereals were grown organically, but the plots are still named ‘normal, half and quarter dosage’.    Year Wheat Barley Date Normal Half Quarter Date Normal Half Quarter 1997 24 June 2 1 5 23 June 0 0 3 7 July Pirimicarb 25 June Lambda-cyhalothrin 16 July 5 13 56 16 July 4 6 10 1998 15 June 55 39 43 15 June 98 100 100 23 June Tau-fluvalinat 16 June Pirimicarb/Tau-fluvalinat 29 June 45 55 73 29 June 3 6 16 13 July 2 17 47 13 July 0 0 12 1999 14 June 3 2 4 14 June 7 8 16 15 June Tau-fluvalinat 16 June Tau-fluvalinat 23 June 3 3 3 23 june 11 1 1 30 June 0 3 5 30 June 0 1 0 2000 02 June 0 0 0 02 June 93 96 99 29 June 9 16 10 29 June 2 4 2 19 July 36 58 52 19 July 4 5 6 2001 26 June 34 15 * Aphididae attack in 2001 negligible 3 July 66 64 62 17 July 13 9 5 * Data missing