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Your search keyword '"Mamrutha, Harohalli Masthigowda"' showing total 2 results
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2 results on '"Mamrutha, Harohalli Masthigowda"'

1. Pyroxasulfone based tank-mix herbicide combinations for diverse weed flora control in wheat.

Author

Samota, Shiv Ram, Chhokar, Rajender Singh, Yadav, Dharam Bir, Kumar, Nitesh, Gill, Subhash Chander, and Mamrutha, Harohalli Masthigowda

Subjects
WEED control, WHEAT, METRIBUZIN, WEEDS, BOTANY, FIELD research, HERBICIDES
Abstract

Field studies were conducted to assess the efficacy of pyroxasulfone alone and its combinations with other herbicides at different time of application against a diverse weed flora in wheat (Triticum aestivum L). Applications of pyroxasulfone at 125 g/ha as pre-emergence (PE) or early post-emergence (EPO) at 20 days after sowing effectively controlled the grass weeds (Phalaris minor Retz. and Avena ludoviciana Durieu). However, pyroxasulfone alone exhibited poor control of broad-leaved weeds, such as Medicago denticulata Willd and Rumex dentatus L. To address the limitations in controlling broad-leaved weeds, tank mix combinations of pyroxasulfone at 125 g/ha with either pendimethalin at 1000 g/ha or metsulfuron at 4 g/ha or metribuzin at 300 g/ha proved highly effective. Pre-emergence pyroxasulfone application in combination with either metsulfuron (125 + 4 g/ha) or with metribuzin (125 + 300 g/ha) in wheat gave effective control of diverse weed flora and improved wheat productivity by 52.1% and 51.2%, respectively, over untreated control. Ready mix combination of clodinafop + metribuzin 60 + 210 g/ha applied as post emergence (32 DAS) provided >99% control of P. minor, A. ludoviciana , M. denticulata and R. dentatus L., however the phytotoxicity with this treatment produced 6.7% lower yield as compared to season long weed free conditions. Among the herbicidal treatments, pre-emergence application of pyroxasulfone + metsulfuron at 125 + 4 g/ha had the highest net returns followed by alone application of pre-emergence metribuzin at 300 g/ha. • Pyroxasulfone at 125 g/ha was highly effective in controlling grass weeds (Phalaris minor and Avena ludoviciana) in wheat. • Pyroxasulfone in combination with either metsulfuron or metribuzin effectively controlled the broad spectrum weed flora. • Pre-emergence application of metribuzin at 300 g/ha was effective for control of P. minor in wheat. • The highest net returns were recorded with pre-emergence application of pyroxasulfone + metsulfuron at 125 + 4 g/ha. [ABSTRACT FROM AUTHOR]

Published
2024
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2. Genotype–Phenotype Relationships for High‐Temperature Tolerance: An Integrated Method for Minimizing Phenotyping Constraints in Wheat

Author

Sharma, Davinder, Chandra Pandey, Girish, Mamrutha, Harohalli Masthigowda, Singh, Rajender, Singh, Nagendra Kumar, Singh, Gyanendra Pratap, Rane, Jagadish, and Tiwari, Ratan

Abstract

Various attempts have been made to understand the traits and genes associated with heat stress tolerance in wheat (Triticum aestivumL.) in the field and under controlled conditions. Attempts made under controlled conditions have not been conclusive, mainly through a lack of sufficient precision in simulating the ambient temperature dynamics and microenvironments prevalent in the field. In addition, inconsistency in field phenotyping is a major concern. Hence, we attempted to develop a method for phenotyping wheat for heat stress tolerance through a novel temperature‐controlled phenotyping facility (TCPF), along with an inexpensive tool to ensure uniform crop establishment. The objective was to improve the precision of assessing plants' responses to elevated temperatures, particularly when these experiments are challenged by a large number of genotypes to be screened that show significant variations in their phenology. The study involved 75 genotypes from a recombinant inbred line population with differing responses to heat stress under three conditions: in the TCPF and in the field [regular field season and late sown (LS)] across two consecutive years. The results revealed that the yield components were different under LS and TCPF conditions. These differences reflected the plants' responses to morphophenological adaptations arising from the late planting time and were not really reflective of the heat stress response. However, greater precision in differentiating high‐temperature responses in the TCPF was evident from the repeatability in terms of growth, physiology, and productivity. This could be attributed to uniform crop establishment and improved capacity to maintain the desired temperature for phenotyping.

Published
2019
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