PROBLEM TO BE SOLVED: To provide an algae moss control agent for lawn that can control the algae moss growing in lawn, and in which there is not worry of chemical injury to the lawn, safety is very high, and administration is easy and an a control method of the algae moss growing in the lawn.SOLUTION: An algae moss control agent for lawn includes fumaric acid or a fumaric acid salt such as sodium fumarate that is a compound having high safety such as being used for a food additive, and a control method of the algae moss growing in lawn includes spraying the fumaric acid or a salt of the same in a lawn vegetation field.COPYRIGHT: (C)2014,JPO&INPIT【課題】 芝生に生える藻苔類を防除でき、芝生に対する薬害の心配がなく、安全性が非常に高く、管理が容易な、芝生用藻苔類防除剤および芝生に生える藻苔類の防除方法を提供する。【解決手段】 食品添加物として広く用いられているほどに安全性の高い化合物であるフマル酸またはフマル酸ナトリウムなどのフマル酸塩を含有する芝生用の藻苔類防除剤、およびフマル酸またはその塩を芝生植生地に散布することを含む、芝生に生える藻苔類の防除方法。【選択図】なし