Chemicka regulace msice chmelove (Phorodon humuli Schrank.,1801) a zhodnoceni jeji rezistence k pesticidum v moravske chmelarske oblasti.

Phorodon humuli (Schrank, 1801) are very significant harmful agents in agriculture. They are 1 - 3 mm large. Their body is fine with different colours. Wing are mebraneous, translucent. Effective hop protection against pests and diseases is the most important condition for high quality hops yields, as a significant raw material for brewing industry. Tests on the efficacy of insecticides against Phorodon humuli were carried out during the period 1993-96 as the registration trials. The aim of these tests was to verify the efficacy of new insecticides. Tests were carried out in the Trsice hop region: in 1993 at the locality Trsice and in 1994-96 at the locality Suchonice (both situated in district Olomouc). Each trial consisted of three groups of variants: standard - Basudin 60 EC (a.i. diazinon), tested plant protection product and untreated control. On the base of these tests a very good efficacy of new products of the group chloronicotinyl insecticides Confidor 70 WG (imidacloprid), Mospilan 20 SP (acetamiprid) and a Chess 25 WP (pymetrozine) was proved. Now only 1 - 2 applications insecticides are necessary for protection of hop-gardens in the Czech Republic (In previous years 3 - 5 applications were requested).Available from STL Prague, CZ / NTK - National Technical LibrarySIGLECZCzech Republi