natural-products-in-plant-pest-management

182 M. Kostyukovsky and E. ShaayaTable 8.7. The distribution of α-terpineol in the chamber space, fi lter paper and thefumigation chamber walls at different temperatures, using stirring.Concentrationused (mg/l air)Temperature(°C)Amount ofα- terpineolin the chamberspace(mg/l air)Total ofα- terpineolrecovered (%)3 20 0.710 85.0(2.682)5 20 0.676 81(4.265)5 25 1.106 84(4.366)10 20 0.782 105(10.932)10 25 1.165 91(9.53)15 20 0.897 112(17.591)Amount recovered (%)Chamberspace27.8(0.745)16.6(0.710)26.4(1.16)7.4(0.820)12.8(1.22)5.2(0.921)Filterpaper10.7(0.287)18.9(0.805)6.1(0.266)41.1(4.54)32.8(3.13)62(10.89)Flaskwalls61.6(1.65)64.5(2.75)67.4(2.96)51.5(5.68)54.4(5.18)33(5.78)The numbers in brackets are the value of α-terpineol in mg, recovered after 24 h of space fumigation.The volume of the fumigation chamber is 1050 ml. The sensitivity of the GC measurements was ± 15%.Table 8.8. Effect of stirring on the distribution of α-terpineol in the chamber space, fi lterpaper and fumigation chamber walls.Concentrationused (mg/l) airStirring timeand intensityAmount ofα- terpineol inthe chamber Total ofspace α- terpineol(mg/l air) recovered (%)5 24 h moderate 0.965 85.0(4.549)24 h slow 0.856 93(4.265)15 min slow 0.800 99(5.200)0 0.858 103(5.320)15 24 h moderate 0.684 107(16.898)0 0.639 111(17.490)Amount recovered (%)Chamberspace22.7(1.010)16.6(0.710)16.2(0.840)16.9(0.901)4.3(0.718)3.8(0.671)Filterpaper6.7(0.278)18.9(0.805)63.5(3.30)76.7(4.080)51.5(8.70)90.9(15.90)Flaskwalls71(3.160)64.5(2.750)20.4(1.060)6.4(0.339)44.3(7.480)5.3(0.919)The numbers in brackets are the value of α-terpineol in mg, recovered after 24 h of space fumigation.The volume of the fumigation chamber was 1050 ml. The fumigation was conducted at a temperatureof 20˚C. The sensitivity of the GC measurements was ± 15%.