Late leaf spot disease

Many large-effect quantitative trait loci (QTLs) for yield and disease resistance related traits have been identified in different mapping populations of peanut (Arachis hypogaea L.) under multiple environments.

10p viseulgi2711 31-08-2021 8 1   Download

The tomato crop attacked by early blight, late blight, leaf spots, anthracnose, Dampimg off, buckeye rot, wilts and root rots. Among these Damping off diseases in tomato caused by Rhizoctonia solani is very common to see in nurseries, an increased incidence of blight caused by Rhizoctonia solani was noticed in recent past in major tomato growing areas of Ranga Reddy district of Andhra Pradesh.

7p nguathienthan8 20-10-2020 11 2   Download

Leaf spots are the most serious foliar fungal diseases of groundnut (Arachis hypogaea L.) World wide. Early leaf spot and late leaf spots, singly or together can cause losses in pod yield of over 50% and reduce the quality of the pod and fodder. Screening of genotypes and advance breeding lines is one of the primary objective for resistance breeding in groundnut. Present investigation was carried out to screen 33 advance breeding lines and 7 released varieties of groundnut against early and late leaf spot diseases.

10p kethamoi7 26-08-2020 18 2   Download

Groundnut (Arachis hypogaea L.) is an important food and cash crop with multifarious usages for resource poor farmers in Asia and Africa. Groundnut yield is constrained mainly due to two major foliar fungal diseases namely, late leaf spot and rust. The regular incidence of these diseases warrants the development of resistant cultivars and the recent advances in the area of crop genomics offer tools to assist breeding in groundnut.

8p trinhthamhodang6 09-07-2020 12 1   Download

Biotic and abiotic stresses are major constraints in the production of groundnut. Among biotic stresses apart from bacterial and viral diseases, many fungal diseases are of economic importance. The major fungal diseases are Early leaf spot (Cercospora arachidicola), Late leaf spot (Cercosporidium personatum), Rust (Puccinia arachidis), Botrytis blight (Botrytis cinera), Aflarot/Yellow mould (Aspergillus flavus), Damping off (Pythium spp.

7p nguathienthan5 04-06-2020 16 0   Download

An experiment was conducted at College of Agriculture, Nagpur to screen forty different groundnut genotypes against tikka disease of groundnut during kharif, 2016-17 in randomized block design with three replications. Biochemical constituents of phenol, total sugar and chlorophyll at 45-50DAS (flowering stage) and 90DAS (pod development stage) were estimated from leaves of healthy and diseased samples. Forty genotypes of groundnut were screened for tikka disease under field condition.

7p trinhthamhodang1213 02-06-2020 12 1   Download

An experiment was conducted at College of Agriculture, Nagpur to screen forty different groundnut genotypes against tikka disease of groundnut during kharif, 2016-17 in randomized block design with three replications. Biochemical constituents of phenol, total sugar and chlorophyll at 45-50DAS (flowering stage) and 90DAS (pod development stage) were estimated from leaves of healthy and diseased samples. Forty genotypes of groundnut were screened for tikka disease under field condition. None of the genotypes were found to be immune to early leaf spot.

6p caygaocaolon5 27-05-2020 12 0   Download

The use of resistant cultivars is the most economical and effective method to control late leaf spot (Phaeoisariopsis personata) in groundnut. In the process of breeding for host plant resistance, the plant material is evaluated in the hot spot location under field conditions. But this process of evaluating the whole crop cycle demands lot of labour and time, the disease expression fluctuates with environmental conditions. Here, we present the improved detached leaf assay method for screening groundnut lines under controlled conditions.

7p trinhthamhodang5 16-05-2020 16 0   Download

The present investigation was conducted to study screening of groundnut genotypes for early and late leaf spot disease 25 genotypes were sown at Research Farm, Department of Genetics and Plant Breeding, Indira Gandhi Krishi Vishwavidyalaya, Raipur, (C.G.).

5p quenchua4 16-04-2020 9 1   Download

Late leaf spot caused by Phaeoisariopsis personata is the most important disease on groundnut worldwide. Although fungicide treatment is effective, it is uneconomical to use because of high cost, hazardous to environment and insensitivity build up in pathogen. The deployment of resistant cultivars is a better option to control LLS disease in groundnut the investigation was undertaken to determine the mode of genetic inheritance of LLS resistance in two F2 and F3 segregating populations of groundnut.

7p cothumenhmong3 22-02-2020 22 1   Download

A population of 53 mutants, their parents and eight cultivated varieties belonging to two subspecies of groundnut were evaluated during kharif 2012 for productivity, oil quality traits and resistance to late leaf spot (LLS) and rust diseases to assess association between these traits and the Arachis hypgaea Miniature Inverted-Repeat Transposable Elements (AhMITE1) markers. Genotypes showed significant differences and high PCV and GCV for all the traits.

10p kethamoi2 14-12-2019 11 0   Download

A new recombinant inbred line (RIL) population was developed from a late leaf spot (LLS) susceptible mutant (VL 1) and its secondary mutant (110) which was resistant to LLS. The RILs (114) were evaluated for yield, yield components, nutritional and oil quality traits, and response to LLS and rust diseases during the rainy season of 2015 to assess the suitability of the mapping population for mapping these traits. The RILs differed significantly for all the traits studied.

10p nguaconbaynhay1 04-12-2019 13 0   Download

A mutant population comprising of 42 primary mutants, 7 secondary mutants and 4 tertiary mutants along with the parent Dharwad Early Runner (DER) and eight most popular groundnut varieties were evaluated during kharif 2012 for various agronomic, traits and for resistance to rust and late leaf spot. The genotypes showed significant genotypic differences for all the quantitative and nutritional traits studied. They also differed significantly for rust and LLS resistance except for LLS at 70 DAS.

8p nguaconbaynhay1 04-12-2019 10 0   Download