Kitin来源防御白僵菌基本毒力的频率(Bals.),褐蝙蝠波浪处理蘑菇(Nilaparvata lugens Stal.)

Nova Laili Wisuda, Subur Sedjati
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引用次数: 0

摘要

白僵菌是一种能有效控制褐飞虱(BPH)的昆虫病原昆虫,但如果不添加含有几丁质和蛋白质的营养物质,则会降低褐飞虱的毒力。本研究的目的是寻找添加虾和蟋蟀粉繁殖球孢菌的最佳方法,这两种粉都是几丁质来源。分离物用马铃薯右旋糖酐琼脂(PDA)培养基培养,并用水稻培养基继续培养。该研究方法采用非析因完全随机设计(CRD),每处理三个处理,包括对照、添加虾粉和添加蟋蟀粉,每个处理六个重复。研究参数包括死亡率百分比、[UNK]分生时间百分比和LT50检验。甲壳质来源可使孢子的生长速率从0.69cm/天提高到1.449cm/天,孢子密度从4.8×106CFU(菌落形成单位)提高到8.2×106CFu。几丁质还影响B.bassiana在BPH中的毒力,它可以使死亡百分比从3%增加到10%,并使BPH的致死时间从0.25天加快到0.45天。虾和蟋蟀粉的几丁质来源没有显著差异,因此使用蟋蟀粉更为可取,因为蟋蟀粉价格较低。[UNK]碱性白腹蛛是一种昆虫病原昆虫,能有效控制狼人巧克力皮(WBC),但如果不提供含有小猫和蛋白质的营养,毒力会降低。本研究旨在寻找最佳的B.bassian分布方法,即添加灰面粉和添加作为kittin来源的深红色面粉。用培养基/多个马铃薯葡萄糖琼脂(PDA)进行分离,并继续进行直到大米。该研究方法采用非因子随机层(RAL)设计,共4个过程和6次重复,包括对照、不添加小猫、添加灰色面粉和添加深红色面粉。研究参数包括死亡率百分比、分生孢子时间百分比和LT50测试。给予胱氨酸源可使生长速率增加到0.69−1.49厘米/天,并使孢子密度增加4.8×106−8.2×106 CFU(菌落形成单位)。Kitin还影响WBC中的基本B.毒力,这可以使死亡率增加3-10%,WBC半衰期增加0.25-0.45天。蟋蟀粉和白蜡粉的瘙痒来源没有显著差异,因此更建议使用蟋蟀粉,因为它更便宜,更容易获得。
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Keragaan Sumber Kitin untuk Mempertahankan Virulensi Beauveria bassiana (Bals.), Jamur Pengendali Wereng Batang Cokelat (Nilaparvata lugens Stal.)
Beauvaria bassiana is an entomopathogenic insect that effectively controls brown planthopper (BPH), but will decrease it virulences if nutrients containing chitin and protein is not added. The aim of this research is to find the best method of B. bassiana propagation with the addition of shrimp and cricket flour, both are chitin sources. Isolates were cultured with Potato Dextrose Agar (PDA) medium and continued with rice medium. This research method used non-factorial Completely Randomized Design (CRD) with three treatments consisting of control, addition of shrimp flour and addition of cricket flour per treatment each with six replications. The research parameters consist of percentage of mortality, percentage of  conidia rising time, and LT50 test. The chitin sources could increases the growth rate from 0.69 cm per day to 1.449 cm per day and increases the spore density by 4.8×106 CFU (Colony Forming Unit) up to 8.2×106 CFU. Chitin also affects the virulence of B. bassiana in BPH where it can increase the percentage of death starting from 3%until10% and made lethal-time of BPH faster from 0.25 to 0.45 day. There is no significant difference between the sources of chitin between shrimp and cricket flour, so it is more advisable to use cricket flour because it is less expensive. IntisariBeauvaria bassiana merupakan serangga entomopatogen yang efektif mengendalikan wereng batang cokelat (WBC), namun akan mengalami penurunan virulensi bila tidak diberikan nutrisi yang mengandung khitin dan protein. Penelitian ini bertujuan menemukan metode terbaik perbanyakan B. bassiana yang dilakukan dengan penambahan tepung ebi dan penambahan tepung jangkrik yang merupakan sumber kitin. Isolat dibiakkan dengan medium per- banyakan Potato Dextrose Agar (PDA) dan diteruskan hingga perbanyakan beras. Metode penelitian ini menggunakan Rancangan Acak Lengkap (RAL) non-faktorial dengan 4 perlakuan dan 6 ulangan yang terdiri atas kontrol, tanpa tambahan kitin, penambahan tepung ebi dan penambahan tepung jangkrik. Parameter penelitian terdiri persentase mortalitas, persentase waktu munculnya konidia dan uji LT50. Pemberian sumber kitin meningkatkan kecepatan pertumbuhan hingga 0,69−1,49 cm per hari dan meningkatkan kerapatan spora berkisar 4,8×106−8,2×106 CFU (colony forming unit). Kitin juga berpengaruh terhadap virulensi B. bassiana pada WBC dimana mampu meningkatkan persentase kematian 3−10% dan waktu paruh kematian WBC 0,25−0,45 hari lebih cepat. Tidak ada perbedaan yang berarti antara sumber khitin dari tepung jangkrik dan tepung ebi sehingga lebih disarankan untuk menggunakan tepung jangkrik karena lebih murah dan mudah didapat.
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