Effect
Increased other
Fosphitall 302 treated Potato, cv. C11/Fripapa/LBR-47, grown in a greenhouse and infected with late blight in the lab had on average a 100 % lower infection efficiency (number of leafs infected relative to number of leafs inoculated) and had no lesions compared to the untreated control. The field experiment revealed that 2.5 g/L of K-phosphite is needed to give a level of control equivalent to commonly used convention contact fungicides and rates above this amount tend to give a better control.
Trial details
indoor, greenhouse, pots with soil substrate, 8 days after treatments 3 leaflets/plant were placed in petri dish and inoculated by potato late blight in growth chamber + outdoor, unprotected, soil grown, natural infestation of late blight
Ecuador
Crop
Potato, Solanum tuberosum L.
Trial application
Method
Foliar spray
Timing
Indoor: First application 45 days after planting, followed by 0 treatment, Outdoor: First application at least 30 days after planting, followed by 5 treatments with a 10-days interval
Rate
4.2 g/L
2012
Use of Phosphonate to Manage Foliar Potato Late Blight in Developing Countries
Plant Disease
96
1008-1015
Crop group
