Veena K, Arunkumar Hosamani, Prabhuraj A, Shivanand Hanchinal, Sharanabasappa S Deshmukh, Adeney de Freitas Bueno, Deeksha M G
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Furthermore, <i>Te. remus</i> exhibited the greatest adult longevity (days) for both males and females, with and without food. Lifespan parasitism under laboratory conditions was the highest for <i>Te. remus</i> (73.60 ± 7.23 eggs), followed by <i>Tr. chilonis</i> (45.40 ± 2.56 eggs) and <i>Tr. pretiosum</i> (42.00 ± 3.70 eggs). Adult emergence (%) was always higher than 90% and the sex ratio was higher than 0.60 for the studied egg parasitoid species. In the cage experiments set up in uncontrolled field conditions, different release densities of <i>Tr. chilonis</i> (50,000, 100,000, and 150,000 parasitoids/ha) were studied. Release densities of 100,000 and 150,0000 parasitoids per hectare were the most effective rates for managing <i>S. frugiperda</i>, with recorded egg parasitism of 71.36% and 72.88%, respectively. These findings provide crucial insights into the biological attributes and parasitism potential of these parasitoids, indicating the optimal release density of 100,000 <i>Tr. chilonis</i>/ha as an integrated pest management strategy against <i>S. frugiperda</i> in maize ecosystems.</p>","PeriodicalId":9370,"journal":{"name":"Bulletin of Entomological Research","volume":" ","pages":"1-7"},"PeriodicalIF":1.6000,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Performance of four major egg parasitoids as biocontrol agents against <i>Spodoptera frugiperda</i> (J. E. 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引用次数: 0
摘要
拟寄生物是一种有效的防蝇剂。本研究在25±1℃,70±5% RH, 14/10 h (L:D)光周期条件下,研究了四种卵寄生蜂(红赤眼蜂、前赤眼蜂、双头赤眼蜂和细尾赤眼蜂)对果形赤眼蜂卵的寄生作用。然后,在玉米田条件下,在1 m × 1 m的网箱内,对实验室最佳赤眼蜂品种赤角曲螨进行了研究。记录了不同种属的卵成期(d)。最长的是雷氏菌(10.00±0.89天),最短的是腊肠菌(7.80±0.66天)。此外,Te。在有食物和没有食物的情况下,雄性和雌性的雷姆斯都表现出最大的成年寿命(天)。在实验室条件下,寄生率最高。排在第二位的分别是褐褐蝽(45.40±2.56)和褐褐蝽(42.00±3.70)。所研究的卵类寄生蜂成虫羽化率均大于90%,性别比均大于0.60。在无控制的田间条件下设置笼型试验,研究了不同释放密度(5万只、10万只和15万只/公顷)的褐家蝇。每公顷放生10万只和15万只寄生蜂的放生密度最有效,卵寄生率分别为71.36%和72.88%。这些研究结果为了解这些寄生蜂的生物学特性和寄生潜力提供了重要的见解,表明玉米生态系统中100,000 Tr. chilonis/ha的最佳释放密度可作为一种综合虫害管理策略。
Performance of four major egg parasitoids as biocontrol agents against Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) eggs.
Parasitoids are effective biocontrol agents against Spodoptera frugiperda. Here, we studied four egg parasitoids (Trichogramma chilonis, Trichogramma pretiosum, Trichogrammatoidea bactrae, and Telenomus remus) on S. frugiperda eggs under laboratory conditions [25 ± 1 °C, 70 ± 5% RH, 14/10-h (L:D) photoperiod]. Then, Tr. chilonis (the best trichogrammatid species in the laboratory) was studied inside cages (1 m × 1 m) under maize-field conditions. Egg-to-adult periods (days) were recorded among different species, with Te. remus having the longest (10.00 ± 0.89 days) and Tr. bactrae the shortest (7.80 ± 0.66 days) periods. Furthermore, Te. remus exhibited the greatest adult longevity (days) for both males and females, with and without food. Lifespan parasitism under laboratory conditions was the highest for Te. remus (73.60 ± 7.23 eggs), followed by Tr. chilonis (45.40 ± 2.56 eggs) and Tr. pretiosum (42.00 ± 3.70 eggs). Adult emergence (%) was always higher than 90% and the sex ratio was higher than 0.60 for the studied egg parasitoid species. In the cage experiments set up in uncontrolled field conditions, different release densities of Tr. chilonis (50,000, 100,000, and 150,000 parasitoids/ha) were studied. Release densities of 100,000 and 150,0000 parasitoids per hectare were the most effective rates for managing S. frugiperda, with recorded egg parasitism of 71.36% and 72.88%, respectively. These findings provide crucial insights into the biological attributes and parasitism potential of these parasitoids, indicating the optimal release density of 100,000 Tr. chilonis/ha as an integrated pest management strategy against S. frugiperda in maize ecosystems.
期刊介绍:
Established in 1910, the internationally recognised Bulletin of Entomological Research aims to further global knowledge of entomology through the generalisation of research findings rather than providing more entomological exceptions. The Bulletin publishes high quality and original research papers, ''critiques'' and review articles concerning insects or other arthropods of economic importance in agriculture, forestry, stored products, biological control, medicine, animal health and natural resource management. The scope of papers addresses the biology, ecology, behaviour, physiology and systematics of individuals and populations, with a particular emphasis upon the major current and emerging pests of agriculture, horticulture and forestry, and vectors of human and animal diseases. This includes the interactions between species (plants, hosts for parasites, natural enemies and whole communities), novel methodological developments, including molecular biology, in an applied context. The Bulletin does not publish the results of pesticide testing or traditional taxonomic revisions.