FUNGICIDE APPLICATION TIMING AGAINST SCLEROTINIA STEM ROT ON WINTER AND SPRING OILSEED RAPE IN LITHUANIA
Eglė Petraitienė, Roma Semaškienė, Birutė Vaitelytė
Pages: 140-147 Published: 1 Jun 2014
Views: 2,808 Downloads: 1,067
Abstract: The present study provides the data of research into the fungicide application timing against Sclerotinia stem rot on winter and spring oilseed rape during the 2011-2012 cropping seasons in Lithuania. The fungicides (boscalid and prothioconazole+tebuconazole) were applied once at different flowering stages. The application time according to GS was associated with ascospores production peak. The peak of ascospores on the petals was recorded at the full flowering stage of winter oilseed rape in 2011-2012 and in spring oilseed rape in 2011. High infection was established at end of flowering in 2012 in spring oilseed rape. Application of fungicides at peak of ascospores gave the best control of the disease. However, non-significant differences in incidence and severity were identified between fungicide application times in both crops. Fungicides application at ascospores release peak gave the best control of Sclerotinia stem rot and yield increase.
Keywords: sclerotinia sclerotiorum, winter and spring oilseed rape, fungicides