Articles
Effect of different fungicides on the control of Lasiodiplodia theobromae causal agent of dieback in blueberries in the Chavimochic Irrigation Project in Peru
Article number
1357_40
Pages
281 – 288
Language
English
Abstract
Blueberry is one of the main export fruit crops in Peru, with an area of 13,000 ha under production, of which 6500 ha are in the Chavimochic Irrigation Project in northern Peru.
The main disease problem is the dieback caused by the fungi Lasiodiplodia theobromae. This pathogen occurs mainly after pruning during the months of December to January where the incidence can be higher than 10% in several fields.
The objective of this research was to evaluate different fungicides for the control of this fungi, both in vitro and in inoculated plants under field conditions.
Twelve fungicides were evaluated in vitro on potato dextrose agar (PDA) medium, of which five were selected for field evaluation.
Under field conditions, the Ventura cultivar was used, where the percentage of diseased stems previously treated with fungicides was evaluated after 65 days.
The fungicide with the best performance was cyprodinil + fludioxonil, followed by thiabendazole, which showed statistically less damage compared to the inoculated control.
The second field trial was the application of the fungicide hymexazol applied by drench to the root system, no statistical differences were found between the doses of 2 and 4 L ha‑1, but they were statistically different compared with the inoculated control.
In conclusion, the aerial application of cyprodinil + fludioxonil and soil application of hymexazol were effective in the control of Lasiodiplodia teobromae under the Chavimochic Project conditions.
The main disease problem is the dieback caused by the fungi Lasiodiplodia theobromae. This pathogen occurs mainly after pruning during the months of December to January where the incidence can be higher than 10% in several fields.
The objective of this research was to evaluate different fungicides for the control of this fungi, both in vitro and in inoculated plants under field conditions.
Twelve fungicides were evaluated in vitro on potato dextrose agar (PDA) medium, of which five were selected for field evaluation.
Under field conditions, the Ventura cultivar was used, where the percentage of diseased stems previously treated with fungicides was evaluated after 65 days.
The fungicide with the best performance was cyprodinil + fludioxonil, followed by thiabendazole, which showed statistically less damage compared to the inoculated control.
The second field trial was the application of the fungicide hymexazol applied by drench to the root system, no statistical differences were found between the doses of 2 and 4 L ha‑1, but they were statistically different compared with the inoculated control.
In conclusion, the aerial application of cyprodinil + fludioxonil and soil application of hymexazol were effective in the control of Lasiodiplodia teobromae under the Chavimochic Project conditions.
Publication
Authors
W. Apaza-Tapia, E. Gonzales, J. Sanchez, P. Quiroz-Delgado
Keywords
Lasiodiplodia theobromae, fungicides, chemical control, Vaccinium corymbosum
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