Study of haemocytes of the rice brown planthopper, <em>Nilaparvata lugens</em> Stål (Hemiptera: Delphacidae)

Purpose: The brown planthopper (BPH), Nilaparvata lugens, is one of the most serious insect pests rice (Oryza sativa L.) in South and East Asia also parts Pacific Australia. BPH, like other insects, able to build up powerful innate immune responses against invading pathogens cellular immunity mediated by haemocytes. Hence, an attempt was made investigate detailed microscopic analysis haemocytes BPH. Research Method: study primarily concerned with haemocyte profile BPH emphasis on changes total differential population three different life stages; 5th nympal stadium, newly emerged adults (post-moulting adult 1-3 days old) matured (15 for insight physiological events during morphogenesis Findings: According light examinations, haemogram comprised six types viz. prohaemocytes (PRs), plasmatocytes (PLs), granulocytes (GRs), adipohaemocyte (ADs) oenocytoids (OEs) spherulocytes (SPs). It estimated that mean numbers count are varied from 6096.4 7393.6 cells per mm3 haemolymph stages insects it statistically increased mature adults. PLs, GRs PRs abundant all development while SPs scarcest type. Originality/value: To our knowledge, this first report has detected these data valuable future avenues immunological research