R. solani

Nghiên cứu này được thực hiện nhằm đánh giá khả năng gây bệnh của hai nhóm nấm này trên 8 loại rau ăn quả, ớt và rau ăn lá trong điều kiện phòng thí nghiệm và nhà lưới cho thấy, cả hai mẫu nấm có hạch (L-LA2) và không có hạch (XL-LĐ) đều có khả năng xâm nhiễm, gây hại nhanh và nặng trên nhóm rau ăn lá cải xanh, cải ngọt và cải thìa với tỷ lệ bệnh 100% ở 5 và 14 ngày sau chủng.

9p tueman06 06-09-2023 9 2   Download

Nghiên cứu đã được thực hiện nhằm phân lập và tuyển chọn ra dòng Pseudomonas phát huỳnh quang có khả năng đối kháng nấm R. solani Kuhn. Các mẫu đất thuộc vùng rễ của năm loại cây trồng (cây lúa, bắp, mía, hành và huệ) được thu trên địa bàn 5 huyện Tháp Mười, Thanh Bình, Tam Nông, Lai Vung và Lấp Vò thuộc tỉnh Đồng Tháp.

9p tueman06 06-09-2023 15 3   Download

Sheath blight (SB), caused by Rhizoctonia solani, is a common rice disease worldwide. Currently, rice cultivars with robust resistance to R. solani are still lacking. To provide theoretic basis for molecular breeding of R. solani-resistant rice cultivars, the changes of transcriptome profiles in response to R. solani infection were compared between a moderate resistant cultivar (Yanhui-888, YH) and a susceptible cultivar (Jingang-30, JG).

16p vijeeni2711 24-07-2021 5 0   Download

Luận văn được thực hiện với mục tiêu nhằm tinh sạch hợp chất thứ cấp có hoạt tính kháng nấm F. oxysporum và R. solani từ chủng B. subtilis AS; đánh giá tính chất lý hóa của hợp chất được tinh sạch. Mời các bạn cùng tham khảo.

67p zhangyan 13-07-2021 33 4   Download

Vi hạt LDH (Layered double hydroxides) đồng hấp phụ salicylate (SA) chiết xuất từ cây liễu rủ được sử dụng như một chất bảo vệ thực vật có nguồn gốc sinh học để khảo sát hoạt lực kháng nấm Rhizoctonia solani trong điều kiện in vitro, đồng thời khả năng trị bệnh lở cổ rễ do nấm R. solani gây ra trên rau cải của vi hạt LDH cố định SA (LDH/SA) ở các nồng độ xử lý khác nhau cũng được đánh giá trong điều kiện nhà kính.

6p vichaeng2711 04-05-2021 27 1   Download

This study indicated that the leaves and twigs of E. fortune possesses potent in vitro antifungal activity against S. rolfsii and R. solani and contains bioactive compounds that could be used as active ingredients for developing botanical fungicides against plant diseases.

9p nguaconbaynhay11 01-04-2021 14 2   Download

The present investigations were carried out to study the variability of R. solani isolates based on some cultural and morphological characters and correlate these characters with the identification of anastomosis group(s) of the fungal pathogen prevalent in Kashmir and the results are presented herein.

8p trinhthamhodang1218 26-02-2021 15 2   Download

Sixty BLSB affected maize samples were collected from three districts and pathogen was isolated and identified based on morphological, cultural and sclerotial characters using standard descriptions of IMI. Light microscopic studies revealed that all the isolates of R. solani f. sp. sasakiiare characteristically branched out at right angle in the distal end of the cell and showed a characteristic constriction at the point of branching.

13p trinhthamhodang1218 26-02-2021 8 2   Download

There is a need to collect information on the off season survival of R. solani in rice ecosystem on different plant species. Considering the above reason, the present study was under taken by using different crops and weed species from rice growing ecosystem.

9p trinhthamhodang1218 26-02-2021 3 1   Download

The present study focused on the effect of various seaweeds extracts and biocontrol agents on controlling sheath blight in rice caused by R.solani under in vitro condition. Use of biocontrol agents and sea weed extracts is an eco friendly, cost effective and sustainable alternative method in disease management.

10p trinhthamhodang1216 19-11-2020 12 1   Download

In vitro study on the effect of four Trichoderma isolates on the mycelial growth of Rhizoctonia solani showed maximum inhibition of 74.54 per cent and least inhibition of 52.50 per cent. Effects of volatile compound produced by Trichoderma spp. against R. solani were ranged from 15.50 to 26.70 per cent.

10p caygaocaolon8 07-11-2020 6 1   Download

Study carried out of this disease over a period of time revealed that Rhizoctonia solani Kuhn affects the yield severely whenever it occurs at any stage of the crop. In spite chemical measures like copper oxy chloride is recommended based on the previous studies on Rhizoctonia spp., the new fungicides need to be evaluated to find out the effective and economic fungitoxicants with which the disease can be controlled. Keeping in mind the seriousness of the disease, it was planned to elucidate the biocontrol and fungicidal capacity as soil and seed treatment against the pathogen, R.

8p angicungduoc6 22-07-2020 7 1   Download

To manage the disease an investigation at the Department of Plant Pathology, SHIATS-DU, Allahabad was carried out to evaluate the effect of bio-agents viz. Trichoderma viride @ 2%, Pseudomonas fluorescens @ 2%, T. harzianum @ 2%, botanical viz. neem leaf extract @ 5%, neem oil @ 5% and fungicide viz. carbendazim @ 0.2% against R. solani under invitro condition by dual culture and poisoned food technique. All the bioagents and botanical were evaluated singly. All the treatments significantly inhibited the mycelial growth of R. solani as compared to untreated check.

5p chauchaungayxua6 26-06-2020 11 2   Download

Variability in 20 isolates of Rhizoctonia solani Kühn [Teleomorph: Thanatephorus cucumeris (Frank) Donk] causing sheath blight of rice and weeds, was observed by RAPD and ISSR DNA analysis in conjunction with morphology and pathogenicity studies. Studies on morphological characterization of R. solani isolates showed that isolates were highly variable in mycelial growth, color and sclerotial parameters.

13p nguathienthan5 04-06-2020 13 1   Download

Web blight of mungbean is one of the important diseases of mungbean (Vigna radiata L.). Morphological and pathogenic variability of 48 isolates of R. solani from 5 different districts of Uttar Pradesh were studied. Majority of the isolates produced pale brown mycelium with fluffy growth and were categorized into 3 groups on the basis of their growth rate including 11 fast growing, 25 moderately growing and 12 slow growing isolates of R. solani.

10p kethamoi5 03-06-2020 9 0   Download

A survey was conducted during Kharif 2016-2017 to assess the incidence of sheath blight disease in nine districts of Telangana state. The per cent disease incidence (PDI) ranged from 20 to 80 per cent. Maximum PDI (80) was recorded at Miryalaguda block, while minimum (20) was observed at Buddipally, Rudrur, Vangapally and Wyra villages. The maximum severity (9scale) was observed at Huzurnagar and Miryalaguda blocks. The disease was observed from panicle initiation to grain hardening stage.

7p kethamoi5 03-06-2020 8 1   Download

Management of crop diseases by biological control is an alternative and effective approach with minimum deleterious effect on environment and human health for ecosystem stability leading to improvement in crop yields. The present study was undertaken to characterize antagonistic rhizosphere bacteria against phytopathogenic fungi i.e., Neovossia indica and Rhizoctonia solani, which cause Karnal bunt and root rot disease, respectively. Twenty two rhizobacterial isolates out of total 88 isolates obtained from wheat rhizosphere, 25% isolates inhibited the growth of both R. solani and N.

10p trinhthamhodang1213 02-06-2020 11 1   Download

Rhizoctonia solani Kühn [teleomorph :Thanatephorus cucumeris (Frank) Donk] is the most destructive and widely distributed soil borne pathogenic fungus causing black scurf of Potato. Cultural and morphological variability was studied in eleven potato isolates of R. solani collected from different potato growing areas including Haryana, Punjab, Uttarakhand, Rajasthan and Maharashtra etc. Based on the radial colony growth rate, all the isolates were categorised into 3 groups as slow, medium and fast growing. Majority of isolates showed slow colony growth rate.

8p trinhthamhodang5 16-05-2020 15 1   Download

Silver nano particles were synthesized using two potential isolates of Trichoderma, Psudomonas fluorescens and one isolate of pathogen Rhizoctonia solani cell free culture filtrates incubated at different days 0, 5, 10 and 15. The present investigation revealed that bionano preparations irrespective of the isolate source used, i.e., Trichoderma, P. fluorescens or R. solani were found better in decreasing the sheath blight incidence in vitro though variation existed in terms of quantum of disease reduction.

13p trinhthamhodang5 16-05-2020 9 0   Download

Rice sheath blight pathogen Rhizoctonia solani was isolated from the diseased samples obtained from Agricultural Research Station, Nellore. Pathogenicity of R. solani on rice leaves was assessed following detached leaf technique. The herbicides viz., Glyphosate, 2,4-D Sodium salt, Butachlor, Pretilachlor, Oxadiargyl, Pyrazosulfuron ethyl, Bensulfuron methyl 0.6% + Pretilachlor 6%, Cyhalofop-butyl, Bispyribac sodium and Ethoxy sulfuron were tested at recommended concentrations by poisoned food technique were significantly superior over control in checking the mycelial growth of R. solani.

6p nguaconbaynhay5 16-05-2020 16 0   Download