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Study on the curative and eradicant action of fungicide combinations to control late blight in potato

Betty Heremans (UGent) and Geert Haesaert (UGent)
(2005) PPO-Special Report. p.299-306
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Abstract
Commercial fungicide combinations were tested in the field for efficacy on foliar late blight caused by Phytophthora infestans in substitution of tin. When the first disease symptoms appeared, the tested fungicide treatments for late blight control were applied 3 times at 3-day intervals. The effect of the fungicide treatments on epidemic development, tuber rot and blight incidence and tuber yields were determined. Last summer late blight development was arrested in June due to high temperatures and lasting drought. August was characterized by rather low temperatures and high rainfall. These weather conditions were very favourable for the development of late blight. The foliar protection against P. infestans was comparable for all the tested fungicide combinations. The effect of combinations with dimethomorph + mancozeb (AcrobatC, 2.5 kg/ha) was less suppressive for P. infestans than the other fungicides tested. Lowest foliar disease severity was recorded in plots treated with fluazinam (Shirlan, 0.4 l/ha) + cymoxanil + chlorothalonil (Mixanil, 2 l/ha). Furthermore, highest tuber yield was noted in plots treated with fluazinam (Shirlan, 0.4 l/ha) + cymoxanil + chlorothalonil (Mixanil, 2 l/ha). The percentage blighted tubers fluctuated between 5 and 11 %. No fungicide combinations completely arrested epidemic development under the environmental conditions of the trial. However, fluazinam (Shirlan, 0.4 l/ha) + cymoxanil + chlorothalonil (Mixanil, 2 l/ha) controlled P. infestans most effectively.
Keywords
curative and eradicant action of fungicides, late blight, fungicide combinations efficacy, potato, Phytophthora infestans

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Chicago
Heremans, Betty, and Geert Haesaert. 2005. “Study on the Curative and Eradicant Action of Fungicide Combinations to Control Late Blight in Potato.” In PPO-Special Report, ed. C Westerdijk and Huub Schepers, 299–306. Wageningen, The Netherlands: Wageningen University. Applied Plant Research.
APA
Heremans, B., & Haesaert, G. (2005). Study on the curative and eradicant action of fungicide combinations to control late blight in potato. In C. Westerdijk & H. Schepers (Eds.), PPO-Special Report (pp. 299–306). Presented at the 9th Workshop of an European network for development of an integrated control strategy of potato late blight, Wageningen, The Netherlands: Wageningen University. Applied Plant Research.
Vancouver
1.
Heremans B, Haesaert G. Study on the curative and eradicant action of fungicide combinations to control late blight in potato. In: Westerdijk C, Schepers H, editors. PPO-Special Report. Wageningen, The Netherlands: Wageningen University. Applied Plant Research; 2005. p. 299–306.
MLA
Heremans, Betty, and Geert Haesaert. “Study on the Curative and Eradicant Action of Fungicide Combinations to Control Late Blight in Potato.” PPO-Special Report. Ed. C Westerdijk & Huub Schepers. Wageningen, The Netherlands: Wageningen University. Applied Plant Research, 2005. 299–306. Print.
@inproceedings{770298,
  abstract     = {Commercial fungicide combinations were tested in the field for efficacy on foliar late blight caused by Phytophthora infestans in substitution of tin. When the first disease symptoms appeared, the tested fungicide treatments for late blight control were applied 3 times at 3-day intervals. The effect of the fungicide treatments on epidemic development, tuber rot and blight incidence and tuber yields were determined. Last summer late blight development was arrested in June due to high temperatures and lasting drought. August was characterized by rather low temperatures and high rainfall.  These weather conditions were very favourable for the development of late blight. The foliar protection against P. infestans was comparable for all the tested fungicide combinations. The effect of combinations with dimethomorph + mancozeb (AcrobatC, 2.5 kg/ha) was less suppressive for P. infestans than the other fungicides tested. Lowest foliar disease severity was recorded in plots treated with fluazinam (Shirlan, 0.4 l/ha) + cymoxanil + chlorothalonil (Mixanil, 2 l/ha). Furthermore, highest tuber yield was noted in plots treated with fluazinam (Shirlan, 0.4 l/ha) + cymoxanil + chlorothalonil (Mixanil, 2 l/ha). The percentage blighted tubers fluctuated between 5 and 11 \%. No fungicide combinations completely arrested epidemic development under the environmental conditions of the trial. However,  fluazinam (Shirlan, 0.4 l/ha) + cymoxanil + chlorothalonil (Mixanil, 2 l/ha) controlled P. infestans most effectively.},
  author       = {Heremans, Betty and Haesaert, Geert},
  booktitle    = {PPO-Special Report},
  editor       = {Westerdijk, C and Schepers, Huub},
  issn         = {1569-321X},
  keyword      = {curative and eradicant action of fungicides,late blight,fungicide combinations efficacy,potato,Phytophthora infestans},
  language     = {eng},
  location     = {Tallinn, Estonia},
  number       = {11},
  pages        = {299--306},
  publisher    = {Wageningen University. Applied Plant Research},
  title        = {Study on the curative and eradicant action of fungicide combinations to control late blight in potato},
  year         = {2005},
}