The secret to success for maple syrup producers may lie in the science of sanitation.
Simply changing taps and tubing or using special spouts could double the amount of sap seeping from New York’s maple trees, according to Cornell experts who have spent six years researching the topic.
"Taking steps to reduce the microbial contamination that occurs at the tap hole by replacing spouts and drop lines has produced substantial gains in sap production in trials at Cornell’s Arnot Research Forest and in producers’ sugarbushes," said Stephen Childs, Cornell Maple Program director.
The buildup of bacteria and yeast inside tap holes can cause taps to dry up. Microbes can be pulled into the tapholes from old tubing when the tree develops a natural vacuum during freezing temperatures, which can suck sap back into trees. Check valve spouts can prevent this by employing small balls that roll back and forth inside the spout, blocking the flow back into the tree.
Through workshops and webinars, Childs and his colleagues are advocating sanitation techniques among New York’s maple producers. The results have been increased sap yields and expanded production for many, according to Mike Farrell, director of Cornell’s Uihlein Maple Forest in Lake Placid. The average volume of sap per tree varies from 10 to 20 gallons per tap, and it takes about 40 gallons of maple sap to produce one gallon of pure maple syrup.
New York State Maple Producers Association President Dwayne Hill credits the Cornell Maple Program for helping to boost New York’s $12.3 million maple industry.
"The research Steve Childs has done has had a huge impact on being able to tap two to three weeks earlier in the season without worrying about bacteria contaminating the tap hole," Hill says.