Thesis On Turcicum Leaf Blight In Maize

Thesis On Turcicum Leaf Blight In Maize-17
However, score of 2.75, was observed for isolates Et6, Et7, Et11 while Et9, Et10, Et12 recorded a score of 3.92.Significant and positive correlation was observed between disease intensity and relative humidity (maximum and minimum) and rainfall, significant and negative correlation with maximum temperature and minimum temperature.

However, score of 2.75, was observed for isolates Et6, Et7, Et11 while Et9, Et10, Et12 recorded a score of 3.92.

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On severely infected plants, lesions can become so numerous that the leaves are eventually destroyed.

Late in the season, plants may look like they have been killed by an early frost.

Infection is inhibited by high light intensity and warm temperatures.

Leaving large amounts of infected residue exposed in the field and continuing to plant corn in those fields will promote disease progress by providing large amounts of inoculum early in the season.

Thirty six maize genotypes comprising composites, hybrids, inbreds line were screened against Exserohilum turcicum under artificially inoculated field conditions and maximum disease intensity was recorded in Super 1 (55.87) followed by C-8 (55.80).

However, minimum disease intensity was observed in Vivek maize hybrid (3.80%).

The shape of spore observed were curved, elongated, spindle and the pigmentation was red, grey and black. Et12 showed excellent growth on PDA while on V8 medium the isolates showed fair growth.

The pathogenic reaction of different isolates were categorized as per the scale and the isolates Et1, Et2 and Et4 recorded a score of 3.34 while ET3, ET5 and Et8 scored 2.67.

With its characteristic cigar-shaped lesions, this disease can cause significant yield loss in susceptible corn hybrids.

These lesions may first appear as narrow, tan streaks that run parallel to the leaf veins.

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