Cnaphalocrocis medinalis
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The rice leaf folder Cnaphalocrocis medinalis Güenée is a serious insect pest of rice in Asia. This pest occurs in summer, and it is sensitive to high temperature. However, the larvae exhibit heat acclimation/adaptation.
12p vijeeni2711 24-07-2021 10 0 Download
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The present investigation was undertaken during Kharif 2015 and Kharif 2016 to study the effect of habitat manipulation on infestation of rice leaf folder, Cnaphalocrocis medinalis (Guenee) under field condition.
9p gaocaolon9 22-12-2020 24 2 Download
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The present experiment was conducted to assess the comparative efficacy of nine isolates of entomopathogenic fungi and to establish the dose mortality response of the most potent isolate identified from first experiment. Single dose assay of all the nine fungal isolates at 108 spores ml-1 against third instar larvae of C. medinalis, showed that B. bassiana (Bb 5) which recorded cent per cent mortality at eight DAT was significantly superior to other treatments...
7p trinhthamhodang9 16-12-2020 8 2 Download
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The present investigation entitled “Efficacy of certain chemical insecticides against leaf folder, Cnaphalocrocis medinalis Guenee.” was conducted during July, 2015 at Agricultural research farm, SHIATS, Allahabad. The occurrence of leaf folder commenced from 33rd standard week (August 2nd week) with an average 1.54 % infestation. The leaf folder infestation increased and gradually reached peak level of 7.62 % infestation at 38th standard week (September 3rd week).
5p caygaocaolon8 07-11-2020 20 1 Download
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The field experiment was conducted at Central Research Farm of Orissa University of Agriculture and Technology, Bhubaneswar during summer 2014-15 and kharif- 2015 to evaluate the effect of different graded levels of fertilizers and manure on incidence of yellow stem borer, leaf folder and whorl maggot in paddy with twelve treatments and four replications in sub plot size of 15m x 10m taking Lalat and Swarna as test cultivar during summer 2014-15 and kharif -2015 following the recommended package of practices It was observed that the incidence of borer, leaf folder and whorl maggot was enhan...
11p angicungduoc8 07-11-2020 17 2 Download
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The current study highlights the importance of entomopathogenic nematode (EPN), their bacterial symbionts and their combined efficacy along with Bacillus thuringiensis (Bt) in C. medinalis management. In the field experiment conducted at Thenthiruperai, Xenorhabdus bovienii+ Bt and X. japonica combined with Bt found to be more effective with 80.54 per cent and 79.37 per cent reduction in larval population over untreated control respectively.
11p cothumenhmong7 09-09-2020 15 1 Download
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The study was conducted to compare the effects of different plant products: Neem oil, NSKE, Karanj oil, Karanj seed powder extract, Chilli garlic solution, Chilli solution and Chlorantraniliprole on leaf folder‟s population in a rice field at Research cum Instructional Farm, College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya Raipur (C.G.) during Kharifseason 2015-16.
8p cothumenhmong7 09-09-2020 16 1 Download
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Field trials were conducted during the kharif season of 2016 and 2017 in the farmers’ field of Kalain and Borkhola development block of Cachar district of Assam for evaluation of efficacy of insecticides and biopesticides against rice stem borer and leaf folder in the field of High Yielding Variety (HYV) rice, Ranjit. The experiment comprised of 4 treatments including the farmers practice (FP). The study revealed that, lowest mean percentage of infestation of rice stem borer and leaf folder i.e. 3.52 and 2.58 per cent was recorded after 90 days of application with 85.27 and 89.
9p nguaconbaynhay7 15-08-2020 11 1 Download
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A field experiment was conducted at Agricultural College Farm, Bapatla to test the efficacy of some recommended insecticides and fungicides as a tank mix application. Two insecticidal treatments (chlorantraniliprole @ 0.3 ml l-1 and chlorpyriphos @ 2.5 ml l-1 ) and two fungicidal treatments (tricyclazole @ 0.6 g l-1 and isoprothiolane @ 1.5 ml l-1 ) with an untreated control were replicated thrice in a simple randomized block design. The results showed that all the insecticide and fungicide treatments alone and in combination were found superior over untreated check.
13p gaocaolon5 14-06-2020 10 1 Download
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The insecticidal chimeric cry2AX1 gene was introduced into rice indica cultivar ASD16 with a view to impart resistance to a major lepidopteran pest, rice leaf folder. A total of 17 putative transgenic events were generated with two different constructs harbouringcry2AX1 gene and all of them were found to be positive for cry2AX1and hptII genes. The Cry2AX1 protein expression in T0transgenic rice events ranged from 0.021 to 0.093 μg/g of fresh leaf tissue.
12p trinhthamhodang5 16-05-2020 15 0 Download
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Plant defense against herbivores begins with perception. The earlier plant detects the harm, the greater plant will benefit in its arm race with the herbivore. Before feeding, the larvae of the rice pest Cnaphalocrocis medinalis, initially spin silk and fold up a leaf. Rice can detect and protect itself against C. medinalis feeding.
12p viharuno2711 21-04-2020 9 3 Download
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Seasonal abundance studies on parasitoids associated with rice leaf folder, Cnaphalocrocis medinalis were carried out during 2015 and 2016 in two agro-ecological zones of Himachal Pradesh i.e. Zone I (Sundernagar and Nurpur) and Zone II (Palampur and Jogindernagar). Five parasitoids namely, Cotesia cypris Nixon, C. ruficrus Haliday, Trathala flavoorbitalis Cameron, Elasmus sp., and tachnid fly were recorded to be specific to rice leaf folder larvae.
10p trinhthamhodang4 22-03-2020 11 1 Download
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The present investigation was conducted in summer 2018 at BCKV Teaching Farm, Mandouri, Nadia, West Bengal, to evaluate the efficacy insecticide, viz., Spinotetram 0.8% GR at different doze rates against yellow stem borer, Scirpophaga incertulas and Rice leaf folder, Cnaphalocrosis medinalis infesting rice.
9p chauchaungayxua4 22-03-2020 17 2 Download
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The present investigation study on Seasonal Incidence of Insect Pest Species of Paddy Collected Through Light Trapat Jabalpur was carried out at the Krishi Nagar experimental farm, Adhartal, JNKVV, Jabalpur, Madhya Pradesh during the period between the last week of June to the last week of December, 2015.Result showed that all 8 species were identified as pests of paddy having regular occurrence in light trap catches i.e.
13p kethamoi2 15-12-2019 15 0 Download
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Chuyên đề tốt nghiệp: Thử hiệu lực của một số thuốc trừ sâu có nguồn gốc thảo mộc đối với sâu hại chính trên lúa và trên rau cải trong vụ mùa năm 2013 tại xã Thanh An – huyện Điện Biên – tỉnh Điện Biên xác định các chế phẩm, chiết xuất có hiệu lực trừ sâu cao đối với sâu xanh bướm trắng Pierisrapae Linnaeus, rệp cải Rhopalosiphum pseudobrassicae Davis, sâu cuốn lá nhỏ Cnaphalocrocis medinalis Guenee và rầy nâu Nilavata lugen Stal, kết quả nghiên cứu sẽ là cơ sở, đồng thời cũng là tài liệu tham khảo cho các nghiên cứu sau này.
38p daomun 15-04-2014 452 84 Download
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Sâu cuốn lá nhỏ hại lúa Cnaphalocrocis medinalis Guenée là một loài côn trùng thuộc họ Pyralidae (Ngài Sáng), bộ Lepidoptera (Cánh Vảy). 1. Phân bố Sâu cuốn lá nhỏ C. medinalis xuất hiện từ Nhật Bản, theo hướng Đông Nam Á xuống đến châu Úc và đã gây hại nhiều ở các quốc gia như Ấn Độ, Bangladesh, Miến Điện, Cambodia, Indonesia, Hawaii, Lào, Madagascar, Malaysia, Philippines, Sri Lanka, Trung Quốc, bán đảo Triều Tiên, Thái Lan và Việt Nam. ...
5p oceanus75 29-01-2013 127 11 Download
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Trong những năm gần đây, do chuyển dịch cơ cấu giống lúa cùng với sự thâm canh cây lúa đã dẫn đến sự thay đổi thành phần và mức độ gây hại của một số sâu bệnh hại chính. Trong đó, sâu cuốn lá nhỏ (Cnaphalocrocis medinalis) trở thành một đối tượng chính gây thiệt hại nặng đến năng suất lúa ở vùng Khu 4.
7p tam_xuan 25-02-2012 155 17 Download
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Sâu cuốn lá nhỏ (Cnaphalocrocis medinalis) là một loài dịch hại quan trọng trên cây lúa ở nước ta và nhiều nước khác trong khu vực. Sau khi nở sâu non nhả tơ cuốn dọc hai mép lá lúa lại tạo thành cái bao, rồi nằm bên trong ăn chất xanh của lá, chỉ để lại màng trắng bên ngoài. Làm giảm khả năng quang hợp của cây lúa, nếu nặng có thể gây thất thu nghiêm trọng
5p chuong_bac 16-05-2011 239 21 Download