Patchanee Chaiyawat. (2005) Population Increase of Brown Planthopper (Nilaparvata lugen Staยฐl) on Photoperiod Insentitive Certified Rice Varieties. <i>Thai Agricultural Research Journal</i>, <i>23</i>(2), 174-180.Patchanee Chaiyawat. "Population Increase of Brown Planthopper (Nilaparvata lugen Staยฐl) on Photoperiod Insentitive Certified Rice Varieties". Thai Agricultural Research Journal 23 (2005):174-180.Patchanee Chaiyawat. Population Increase of Brown Planthopper (Nilaparvata lugen Staยฐl) on Photoperiod Insentitive Certified Rice Varieties. Department of Agriculture:ม.ป.ท. 2005.