EndoMaxx mycorrhizal, seed treatment, potato production


Agricultural Economics | Agricultural Education | Agricultural Science | Agriculture | Agronomy and Crop Sciences


With the increasing cost of fertilizer and the ever-decreasing supply of apatite worldwide, improving phosphorus (P) uptake should be a goal for all producers. Due to our high levels of iron and aluminum oxides in Maine soils, P efficiency is very poor. As a result, potato farmers tend to over apply P to ensure that their crop will have adequate P. Over time, this has led to increasing plant available soil test P levels. I recently requested the Maine Soil Test Lab director for potato soil tests over the past ten years. The percentage of soils testing above 40 lbs/ac has grown steadily over the past 10 years (Figure 1). Mycorrhizal fungi have long been used as a means to effectively improve P absorption of perennial plants. Less work has been done evaluating these for annual crops. With funding from the Valent corporation, we were able to evaluate one such mycorrhizal fungi product, EndoMaxx, to see if it might improve P uptake, yield and quality of potatoes.

Publication Date



University of Maine Cooperative Extension

Publisher Location

Orono, ME

Publication Title

Cooperative Extension - Agriculture



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Use of EndoMaxx mycorrhizal seed treatment to improve potato production in Maine