Joseph Needham : Mosquitoes that spread disease

Joseph Needham

<p style='text-align: justify;'><p>The poster is in 3 main sections with multiple frames in each. The left hand section introduces three main types of mosquito (which they note “as the most common among the disease infected insects spread by the American imperialists in Korea and Manchuria”), their life cycle, the diseases they spread, and how they transmit these diseases. The central section is headed “If you want to prevent disease, first exterminate mosquitoes要防病，先滅蚊”. The central and right hand section then introduce how to prevent the spread of mosquitoes and how to kill and repel them. This includes spraying with DDT, throwing bags full of wood chips soaked in oil into ponds, and “planting abundant quantities of <i>chuchongju</i> 除蟲菊” (<i>Tanacetum cinerariifolium</i>, a natural source of the insecticide pyrethrum).</p></p>