Výskyt a význam škůdců chmele v chmelařské oblasti Tršicko

Pests of hops were monitored in 2013/2014 in a hop region Tršicko - MORAVA HOP s.r.o. The over flight of aphid Phorodon humuli from winter hosting plants and their occurrence in hops areas was monitored by developed methods for monitoring of aphid in a hop garden and by methods of effective temperature sum (sum of temperatures above 3 °C was measured since 1.1.). The occurrence of Tetranychus urticae was moni-tored by deduction of individuals occurred on the hop leaves. The crawling out of Otio-rhynchus ligustici was monitored from the beginning of starting to grow of hop to the hop insertion into the ground. The efficiency of insecticidal interventions was evaluated by counting of live individuals before application and 3, 7, 14, 21, 28 days after it. The over flights of migrantes alatae from primary hosting plants of genus Prunus began 10th May 2013, in 2014 it was 16 days earlier (24th April). Over flight was finished 15th July 2013 and 5th July 2014. Insecticide Teppeki (flonicamide) was used against aphid in 2013, in 2014 was used Karate with Zeon 5 CS (lambda-cyhalothrin) technology and Movento 150 OD (spirotetramate). The efficiency of insecticides (imidaclopride, flonicamide, spirotetramate) was very good (92.15--100%). Spirotetramate also demonstrated very high acaricidal activity (91.25--100%). The first occurrence of Tetranychus urticae was found out 13th June 2013 and 19th June 2014. Applied acaricides (hexythiazox, fenpyroximate, abamectin) and insecticide spirotetramate reached of very high efficiency even after 14 days of using (96.6--100%). The first oc-currence of Otiorhynchus ligustici was noticed 18th April 2013. The flattening of beetle was finished 14th May 2013. The crawling out of this pest in 2014 was monitored even 8th April. In 2013 about 37.96% of hop gardens were treated against Otiorhynchus ligustici. In 2014 it was about 17.12%. The biological efficiency of Actara 25 WG (thiamethoxam 0.2 kg/ha) was very good (83.93 -- 100%)