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首页> 外文会议>Beltwide Cotton Conferences >NEW ISOLATES OF THE ENTOMOPATHOGENIC FUNGUS, BEAUVERIA BASSIANA, FOR CONTROL OF TARNISHED PLANT BUG, LYGUS LINEOLARIS IN WILD HOST PLANTS AND COTTON
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NEW ISOLATES OF THE ENTOMOPATHOGENIC FUNGUS, BEAUVERIA BASSIANA, FOR CONTROL OF TARNISHED PLANT BUG, LYGUS LINEOLARIS IN WILD HOST PLANTS AND COTTON

机译：昆虫疗法的新分离物，Beauveria Bassiana，用于控制野生饲养植物和棉花的玷污植物虫，Lygus Lineolaris

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New isolates of the entomopathogenic fungus, Beauveria bassiana (Balsamo), are being tested for control of Lygus spp. Previous studies showed that specific isolates from the tarnished plant bug L. lineolaris (Palisot de Beauvois) in MS and the westerntarnished plant bug L. hesperus (Knight) in CA are prolific conidia producers, highly pathogenic, low mycotoxin producers, and more tolerant to high temperature and solar radiation. One isolate each from MS and CA and the commercial isolate (GHA) were evaluated in field trials against L. lineolaris on wild host plants (MS) and cotton (MS), and L. hesperus on alfalfa (CA). Incidence of infection in Lygus was high in wild host plant trials (40-60%) and alfalfa trials (60-90%), but much lower in cotton trials (20-30%), which was likely related to coverage problems. Infection in beneficial insects was negligible in all trials. Although infection was high in wild host plants and alfalfa, in most cases Lygus populations were not significantly reduced by B.bassiana application. The lack of significant population reduction may in part be attributed to the heterogeneity of populations in experimental plots and migration between small plots. However, it may also be an indicator that infection is not progressing to mortality at the high temperatures present during the field tests. Studies using caged adult L. lineolaris in cotton indicated similar mortality of insects sprayed directly and those exposed to treated plant surfaces, however, efficacy of the B. bassiana was greatly reduced after 24 hr indicating a need for formulations to improve persistence.
机译：正在测试昆虫疗法真菌的新分离株，用于控制Lygus SPP的肺疗法嗜睡（Balsamo）。以前的研究表明，来自MS和西部植物Bug L.Hesperus（骑士）的玷污植物虫子（Palisot de Beauvois）的特定分离株在Ca中是多产的生殖器生产商，高致病性，低霉菌毒素生产商，更耐受高温和太阳辐射。在野生宿主植物（MS）和棉花（MS）和棉花（CA）上的L. Lineolaris对L. Lineolaris的实地试验中，对来自MS和Ca和商业分离物（GHA）的一种分离物。野生宿主植物试验（40-60％）和苜蓿试验（60-90％），棉花试验（20-30％）的感染发生率高，但棉花试验可能与覆盖问题有关。在所有试验中，有益昆虫的感染可忽略不计。虽然野生宿主植物和苜蓿中感染高，但在大多数情况下，B.Bassiana应用程序没有显着降低Lygus群体。缺乏大幅度的人口减少可能部分归因于实验图中群体的异质性和小块之间的迁移。然而，它也可能是在现场测试期间存在的高温下的感染在存在的死亡率中的指标。使用笼式成人L. Lineolaris的研究表明，直接喷洒的昆虫的类似昆虫的死亡率，然而，暴露于治疗的植物表面的昆虫的疗效在24小时后大大降低了，表明需要改善持久性的制剂。

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