This often results in overproduction. In summer and autumn, however, heat and humidity induce blight. Typhoons and rainstorms also affect vegetable production and supplies may not meet the demands.
反之，夏秋兩季因為高溫多濕，易生蟲害，又常受颱風及暴雨侵襲，蔬菜不易栽培，因而發生供不應求的現象。