Resources and application prospects of mosquito repellent and mosquitocidal plants A STUDY ON TROPHIC EFFECT OF NEUTRAL INSECT(WRIGGLER) FOR PIRATA SUBPIRATICUS STUDIES ON THE MOSPQUITO COMMUNITIES OF 15 PROVINCES IN CHINA STUDIES ON THE REGULATION EFFECT OF NEUTRAL INSECT ON THE COMMUNITY FOOD WEB IN PADDY FIELD Study on essential oils of medicinal plants in insect repellent