Radovi, No. iz.br. 9, 2006.
Izvorni znanstveni članak
TESTING OF THE EFFECTIVENESS OF FUNGICIDES FOR THE CONTROL OF FUNGUS MICROSPHAERA ALPHITOIDES, GRIFF ET MAUBL. ON OAK SEEDLING PLANTS
Boris Liović
orcid.org/0000-0002-0824-1648
; Šumarski institut, Jastrebarsko
Miljenko Županić
; Šumarski institut, Jastrebarsko
Sažetak
In changed climatic conditions weakened trees have greater difficulty withstanding the
attack of plant diseases and pests. The plant disease powdery mildew, caused by the fungus
Microsphaera alphitoides, Griff et Maubl., is one of the essential factors for the survival of
oak seedling plants and consequently reforestation of oak forests. Consequently, control of
the level of infection by powdery mildew on seedling plants is of great importance.
With the application of fungicide, on previously untreated areas, biotypes of the fungus
react differently to the fungicide. Regardless of the effectiveness of the fungicide, a single
treatment of the recommended doses, i.e. concentrations, can never control all pathotypes
of the fungus, and one part always remains vital. With the use of the same fungicide, or the
same group of fungicides in subsequent years the number of resistant pathotypes constantly
increases.
Although today there are numerous fungicides with excellent effectiveness against oak
powdery mildew, new active substances and combinations of existing active substances are
further tested and introduced into practice in view of broadening their spectrum and/or synergetic
effect.
This paper presents the results of testing new preparations: Artea 330 EC, Impact SC
250, Punch 10 EW and Stroby DF, with Anvil 5 SC used as a standard. Experiment results
indicate the high effectiveness of fungicides. The most effective fungicide was Impact SC
250 (Coefficient of Effectiveness: 93.2 %), Punch 10 EW (91.9 %), Artea 330 EC (91.28
%) and Anvil 5 SC (90.57 %).
The fungicide Stroby achieved much poorer success (K. D. 62.80 %) most probably due
to insufficient dosing, as the lowest recommended dose was used, so that the cost per hectare
can be compared with the other tested fungicides. Another reason is the fact that prior to
application of the preparation on the saplings, powdery mildew had been registered.
Namely, in the case of Stroby it is stated that full protective effect is achieved only if the
preparation is on the leaf before the beginning of infection, i.e. by preventive application.
Ključne riječi
oak sapling; Microsphaera alphitoides; powdery mildew; fungicides; efficacy
Hrčak ID:
26021
URI
Datum izdavanja:
24.9.2006.
Posjeta: 2.292 *