Nilaparvata lugens
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Rầy nâu Nilaparvata lugens Stal. là một trong những loài sâu hại lúa nghiêm trọng làm giảm đáng kể năng suất của cây lúa. Bài viết nghiên cứu một số đặc điểm sinh học, sinh thái của rầy nâu trong điều kiện phòng thí nghiệm ở nhiệt độ 260 C, ẩm độ 72%; 280C, 70% và 300C, 68% với thức ăn là giống lúa VHC.
8p phuong798 26-12-2023 14 3 Download
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Rầy nâu (Nilaparvata Lugens Stal.) là loại dịch hại nguy hiểm tại nhiều vùng sản xuất lúa trên thế giới và các nước khu vực Châu Á, trong đó có Việt Nam. Bài viết Đánh giá tính kháng rầy nâu của một số giống lúa mùa địa phương tại đồng bằng sông Cửu Long được thực hiện nhằm tìm ra nhiều vật liệu quí để cho chọn tạo giống lúa kháng rầy nâu.
4p visybill 19-07-2023 4 1 Download
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Rầy nâu (Nilaparvata lugens Stal.) và rầy lưng trắng (Sogatella furcifera Horvath) là hai đối tượng sâu hại nguy hiểm và thường xuất hiện cùng nhau trên ruộng lúa. Trong nghiên cứu này, 17 giống lúa gieo trồng phổ biến tại vùng Đồng bằng sông Hồng được đánh giá nhân tạo tính kháng với rầy nâu và rầy lưng trắng.
7p viirenerosenfeld 02-06-2022 23 1 Download
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Mục tiêu của luận án nhằm xác định đặc tính sinh học của virus RGSV gây bệnh Lùn lúa cỏ trên lúa ở ĐBSCL; xác định mối quan hệ sinh học giữa RGSV và rầy nâu (Nilaparvata lugens Stal); khả năng chống chịu của một số dòng/giống lúa ở ĐBSCL đối với RGSV. Mời các bạn tham khảo nội dung chi tiết đề tài!
162p ruby000 22-09-2021 15 3 Download
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The insect gustatory system plays a central role in the regulation of multiple physiological behaviors and the co-evolution between insects and their hosts. The gustatory receptors (Gr) are important to allow insects to sense their environment. It is critical to the selection of foods, mates and oviposition sites of insects.
12p viseulgi2711 31-08-2021 3 1 Download
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The brown plant hopper (BPH), Nilaparvata lugens, is one of the major pest of rice (Oryza sativa). Plant defenses against insect herbivores have been extensively studied, but our understanding of insect responses to host plants’ resistance mechanisms is still limited.
18p visilicon2711 20-08-2021 10 1 Download
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The brown planthopper (BPH, Nilaparvata lugens Stål) is a kind of phloem-feeding pest that adversely affects rice yield. Recently, the BPH-resistance gene, BPH6, was cloned and applied in rice breeding to effectively control BPH. However, the molecular mechanisms underlying BPH6 are poorly understood.
17p vijeeni2711 24-07-2021 5 0 Download
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Mục tiêu nghiên cứu của đề tài là xác định hiện trạng sử dụng thuốc bảo vệ thực vật và tính kháng thuốc của các quần thể rầy nâu ở một số tỉnh trồng lúa, làm cơ sở khoa học đề xuất giải pháp quản lý tính kháng thuốc của rầy nâu.
195p chuheodethuong 09-07-2021 20 4 Download
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Host adaptation is the primary determinant of insect diversification. However, knowledge of different host ranges in closely related species remains scarce. The brown planthopper (Nilaparvata lugens, BPH) and the small brown planthopper (Laodelphax striatellus, SBPH) are the most destructive insect pests within the family Delphacidae.
12p vijeeni2711 30-06-2021 12 1 Download
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The biochemical constituents of the rice plants contributing to resistance has been studied from time immemorial. In the present study the biochemical constituents in DSR and TPR ecosystem were compared so as understand the role of biochemical defense.
8p gaocaolon9 22-12-2020 6 1 Download
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Agriculture is the most important sector of Indian Economy. Indian agriculture sector accounts for 18 per cent of India's gross domestic product (GDP) and provides employment to 50% of the countries workforce. Among cereals, Rice (Oryza sativa I.) is the most important cereal crop of the world both in respect to area and production. The total Rice production in the world is 496.22 million metric tons as estimated by the United states Department of Agriculture in April 2020 (USDA). India ranks second in rice production in the world with the production of 116.42 million metric tons.
8p trinhthamhodang9 16-12-2020 13 1 Download
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The present findings aimed to assess the effect of various doses of silicon in imparting resistance to rice plants against brown plant hopper.
7p trinhthamhodang9 16-12-2020 7 2 Download
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The experiment was conducted in glasshouse to compare the efficacy of Buprofezin 25SC insecticide sold by the different manufacturers under different trade names against brown plant hopper Nilaparvata lugens Stal. (BPH) on rice cultivar TN-1 at Department of Entomology, G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, India for two cropping seasons during kharif 2011 and 2012.
5p angicungduoc8 07-11-2020 7 1 Download
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Brown plant hopper (BPH), Nilaparvata lugens Stal is one of the most serious rice pest in India. Growing of resistance varieties is the most effective and environment-friendly strategy for protecting the crop from BPH. In the present study we evaluated the forty entries of plant hopper screening trial against BPH under glass house condition. The trial material was received from All India Coordinated Rice Improvement Programme (AICRIP) DRR, Hyderabad during kharif 2011.
6p angicungduoc8 07-11-2020 14 1 Download
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Three brown planthopper (BPH) resistant (Ratnachoodi, Rajamudi, JBT 36/14) and two susceptible donors (TN 1 and Jaya) of rice were studied at Department of Agricultural Entomology, ZARS, V. C. Farm, Mandya.
6p angicungduoc8 07-11-2020 12 0 Download
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A field trial was conducted to quantify the role of Integrated Pest management (IPM) against brown planthopper Nilaparvata lugens Stal. in the upland rainfed rice growing areas of West Bengal, India during 2002-03 and it was reevaluated during 2017-18.
7p caygaocaolon7 18-09-2020 6 0 Download
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Present investigation includes anatomical study of wild rice accessions at internodes position were carried out to understand the relationship between plant anatomy and resistance against Brown plant hopper. This study includes thickness of epidermis and distance between epidermis and vascular bundle and the corresponding evaluation of accessions through seed box technique.
8p cothumenhmong7 09-09-2020 11 1 Download
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Hence, present study was undertaken on DNA molecular characterization of BPH population using SSR markers that will give clear understanding of BPH diversity in Gangavathi region. Ten SSR markers were screened in the selected 25 BPHs and all ten markers were screened to assess the molecular diversity.Genotyping data of SSR markers were analyzed using Unweight pair group method with Arithmetic Mean (UPGMA) method using DARwin V6.0.
7p kethamoi7 26-08-2020 13 2 Download
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The objective of the present study is to identify BPH resistance donors using field as well as controlled screening method.
9p nguaconbaynhay7 15-08-2020 14 2 Download
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Evaluation of resistance in some rice genotypes against brown Planthopper, Nilaparvata lugens (Stal)
Studies were carried out under glass house conditions to study the evaluation of resistance in some rice genotypes against Brown plant hopper, Nilaparvata lugens. Among the rice genotypes tested against N. lugens (Stal), Ptb 33 (the resistant check) lowest mean damage rating (1.00), while genotypes, PTB 41 exhibited a damage score ranging from (1.00-1.67), when compared to T(N)1 (9.00).The genotypes viz., Co 43, ADT 36, Columbia, Swarna, SR 26B were moderately resistant with damage rating of (3.00-3.67) and the remaining genotypes were moderately susceptible or highly susceptible.
5p angicungduoc6 20-07-2020 26 1 Download