Thesis on turcicum leaf blight in maize

Meli and Kulkarni evaluated ten fungicides against E. Further, these 16 different isolates were tested on 16 differential hosts under field conditions during kharif The radial growth of the test fungus in the treated plates was measured in all treatments when the pathogen growth touched the periphery in the control petridishes.

Further, cross inoculations were made from each culture to highly susceptible cultivar CM and also maize isolate to other hosts. Maize is the staple food for the Tibetian refugees settled in various refugee settlement areas of the state.

Genetic analysis of flowering period in Rabi maize (Zea Mays L.)

The necrotised leaf bits along with some healthy portions were surface sterilised in 1: The standard heterosis revealed that hybrids viz.

The diseased leaf material was brought to the laboratory and air dried in shade for 24 hours. The fungus belongs to division Eumycota, sub-division Deuteromycotina, order Moniliales and family Dematiaceae.

The resistant lesion type and the susceptible lesion type were use to screen the F2: The gain per cycle from C0 to C2 was The sixteen RAPD primers that generated polymorphic DNA fragments between parents were analyzed and the average number of bands per primer was again between 4 and 5.

Individuals in subsequent cycles were not selfed, instead in A, families of C1 were grown in isolation to generate C2. Many R-genes are located in clusters that either comprise several copies of homologous sequences arising from a single gene family or co-localized R-gene sequences derived from unrelated gene families [ 89 ].

Epidemiological studies play a vital role in developing prediction and forecasting models about disease progress in relation to disease incidence and environmental factors.

Taro Leaf Blight—A Threat to Food Security

Observations on spore germination was recorded at 4, 8, 12, 16, 20, 24, 28, 32 and 36 hours after incubation for spore germination. Molecular markers can also accelerate selection and eliminate the effects of environmental variation during selection Malyshev and Kartel, Leonard and Suggs is an important foliar disease of maize worldwide.

These bio-control agents were screened under in vitro conditions against E. It is not only utilised as a staple food by the lower strata of the society, but it is also a crop par excellence for industrial use.

For this study, a set of near isogenic lines NILs derived from five teosinte accessions were used to examine resistance to the northern leaf blight NLBcaused by Exserohilum turcicum.

Such slides were kept in moist chamber at room temperature. These treatments were tested individualy and in combinations. Field experiments were laid out in randomised block design using hybrid DMH-2 during kharif and It has relatively small genome of million base pairs.

It also reduced the per cent disease intensity in the field when applied to the foliage. Generation mean analysis was used to determine the contribution of additive, dominant and epistatic genetic effects and also to confirm the genetic ratio analysis for the population distribution under a greenhouse and field conditions.

Genome data further showed that the St genes are highly conserved within monocots. The intensity of turcicum leaf blight was severe in field inoculation screening trials. Information on epidemiological studies and integrated disease management strategies are lacking.

Regular monitoring was done and the observations were recorded 20 days after inoculation for the development of symptoms. Besides the commercially cultivated area, Karnataka has a sizeable area under seed production programmes of both public and corporate sector.

The test lines were sown in a randomised block design with the plot of 5 m x 3 m size spaced at 75 x 20 cm and replicated twice.

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For the bulks, resistant and susceptible bulks were prepared from F2 individuals by pooling aliquots containing equivalent amounts of total DNA from each of the fourteen extremely resistant and fourteen extremely susceptible F2 progenies.

Sorghum production especially in the tropics is affected by several pests and diseases. At 35 and 50 DAS, hexaconazole 0. Cumulative spore catch was correlated with the disease progress in the field.

From a total of 1, fragments, only three 0. The leaf blight severity was recorded at silk drying stage following rating scale.

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All the chemicals reduced disease intensity and increased the grain yield with mancozeb being distinctly the most effective, followed by carbendazim, zineb, thiophanate methyl and lastly copper oxychloride. However, a comprehensive review of the published literature shows that sorghum resistance to TLB has received limited research attention and the E.

Controls without fungicides were also maintained. In this study there was a clear difference between greenhouse and field environments.

Exserohium Turcicum Incidence of turcicum leaf blight of maize virulence characteristics and survival of Cercospora populations causing maize grey leaf spot in Kenya.Setosphaeria turcica (anamorph Exserohilum turcicum, formerly known as Helminthosporium turcicum) is a fungal pathogen that causes northern corn leaf blight (NCLB) in maize.

NCLB is a serious, omnipresent foliar disease [ 1, 2 ]. Maize breeding efforts have included addressing yield deterioration as a consequence of low soil fertility, low fertilizer use, poor agronomic performance, and high susceptibility to diseases such as maize streak virus, turcicum leaf blight and grey leaf spot.

Inthe Uganda cereals research programme released three maize varieties, namely. Additionally, BIO-MZN01 can yield up to six to eight tonnes per hectare(t/ha), nearly double the national average in Colombia of t/ha and is tolerant to several maize diseases that are common in the region, including rust, turcicum leaf blight, and gray leaf spot.

Topics of Research/ Thesis Title Year of thesis submission ENTOMOLOGY 1. Mr. Mariana Dkhar Dr. Ram Dutta Eco-friendly management of Late blight (Phytophthora infestans) of tomato in mid hill conditions of Meghalaya Dr.

Ram Dutta Studies on turcicum leaf blight of maize and its management through eco-friendly methods in Meghalaya. Studies on genetic analysis ofyield and resistance to leaf blight (Helminthosporium turicum pass) in maize (Zea Mays L).

Ph.D thesis submitted to A.P. Agricultural slcbrand.comranagar, Hyderabad. Leaf extract of R. serpentine at 10% concentration, has been quite effective in controlling the spot blotch of wheat incited by Bipolaris sorokiniana (Malik et al., ) and maydis leaf blight of maize (ICAR-Indian Institute of Maize Research, ) which encourages the present findings.

With regards to disease control, sarapagandha leaf.

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Thesis on turcicum leaf blight in maize
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