Leading Japanese insecticide manufacturer Earth Corp. plans to expand sales in China and Southeast Asia via a subsidiary in Malaysia, as the risk of dengue fever and malaria in the region drives up demand for repellents.

The company has set up a wholly owned unit in Kuala Lumpur to market insecticides and air fresheners domestically and for export, according to a statement last week. It plans to start operations by October.

The company already has production and sales bases in Thailand and Vietnam that will supply its products to the new subsidiary, Earth Home Products (Malaysia). It also has three sales units in China.