Heavy rains are jeopardizing the harvest in Germany, Joachim Rukwied, head of the German Farmers’ Association said on Monday. The grain harvest is predicted to come in at 42 million tons, slightly below last year’s result, Rukwied explained during a farm visit in Frankfurt. Warm and moist conditions were promoting rot in the potato crop, with the result that harvests could fail in the absence of pesticides, he said. Rukwied said that pesticides were needed, given flooding and waterlogging. “In combination with rising temperatures, the risk of fungal infestation is rising sharply in many crops,…