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2726908 
Technical Report 
Amitraz effects on Psylla pyri L 
Injac, M; Krnjajic, S; Peric, P 
1992 
BIOSIS/93/32225 
43 
4 
281-292 
scr 
BIOSIS COPYRIGHT: BIOL ABS. Amitraz is recommended for control of P. pyri in summer since the higher temperatures enhance its activity. Due to the weaker effects of IGR insecticides (di-phlubenzurone and others), Amitraz has recently been used in the spring as well, but with various success. With all this in mind, we aimed our research to the field experiments that would help us determine the adulticide and larvicide activity of Amitraz on high density P. pyri in the springtime weather conditions. The experiment was set up in the pear orchard of 180 ha in Sremska Mitrovica region on the abundant variety Bela di Djuno. The pear shoots had from 10-14 leaves with the fruits pointed toward the top of the tree. Treatments: 1. Amitraz (Mitac 20 EC; concentration 0.4%). Mitac 20 EC is manufactured by Shering, Berlin. 2. Amitraz (Mitac 20 EC; concentration 0.3%) + Cipermetrine (Ripcord 20 EC; concentration 0.02%). Ripcord 20 EC is made by Shell, London. 3. Amitraz (Mitac 20 EC; concentration 0.3%) + acrin