| Aiming at the problem of upper pest of the warehouse to eliminate difficultly, four kinds of propoxur or metolcarb or cypermethrin and trichlorfon pesticide smoke agents are developed about the project team,smoked agents on the insecticidal activity of stored grain insect Rhyzopertha dominica, Sitophilus zeamais prepared were determined. The results show that:the fumigant ignited to produce a large number of white clouds,the effective material is evenly dispersed. The test results show that the smoke agent storage stability， ignition temperature higher than 180 ℃,when the auxiliary fuel (chaff) and oxidant (ammonium nitrate) with mass ratio of 3∶〖KG-*2〗1,preparation of the smoke agent combustion stability without fire, The mortality was above 90% applying 5% MTMC-trichlorfon and 25% propoxur-cypermethrin in dosage 5 g/m3 of Maize weevil and resistant strain(phosphine resistance,hereinafter the same) or Rhizopertha dominica and resistant strain min was 30. The barn 5% MTMC-trichlorfon and 25% propoxur-cypermethrin smoke agent at 60 g/m3 closed 72 h to the maize weevil and resistant strain,Rhizopertha dominica and resistant strain effect is the mortality was above 90%,dosage of 45 g/m3 positive rate of maize weevil and resistant strain effect was more than 90%,the product is safe and reliable,and has a good application prospect. |
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