Allelopathic impact of sorghum on weed management, yield and quality of maize under different seed rates | [Pakistan Journal of Weed Science Research • 2021]

Author(s):

1. Tariq Ahmed Keerio: Department of Agronomy, Sindh Agriculture University,Tandojam, Pakistan

2. Muhammad Nawaz Kandhro: Department of Agronomy, Sindh Agriculture University,Tandojam, Pakistan

3. Ahmed Naqi Shah: Department of Agronomy, Sindh Agriculture University,Tandojam, Pakistan

4. Muhammad Ibrahim Keerio: Department of Crop Physiology, Sindh Agriculture University,Tandojam, Pakistan

5. Ghulam Murtaza Jamro: Department of Soil Science, Sindh Agriculture University,Tandojam, Pakistan

Abstract:

A field study was carried out to estimate the allelopathic potential of sorghum immature and mature plant extracts under various seed rates on weeds density and yield of maize cultivar Dadu Maize-I. The experiment includes different weed control practices i.e., control (No weeding), various levels of sorghum immature and mature plant extracts, herbicides and hand weeding under various seed rates (20, 25, 30 and 35 kg per ha). The results showed that various weed control practices demonstrated substantial decrease in weeds and caused increase in kernel yield over control. The application of sorghum immature extract @ 15 L per ha in combination with herbicide (Mesotrione Atrazine) @ 1.0 L per ha decreased effectively weed density (m-2) and dry biomass (g m2) and resultantly produced superior growth and yield traits particularly kernel yield (t per ha) of maize. Sorghum mature plant extract @ 15 L per ha in integration with herbicide (Mesotrione Atrazine) @ 1.0 L per ha ranked 2nd in effectiveness of controlling weeds as well as increasing maize kernel yield (t per ha). As the effect of seed rates is concerned, the least weed density (m-2) and greatest kernel yield (t per ha) were noticed in seed rate 35 kg per ha, but optimal kernel yield (t per ha) was record in seed rate 30 kg per ha. Hence, the results suggested that combination of plant extracts and herbicide at reduced doses-controlled weeds efficiently and optimum enhancement in kernel yield of maize at a seed rate 30 kg per ha.

Page(s): 513-526

DOI: DOI not available

Published: Journal: Pakistan Journal of Weed Science Research, Volume: 27, Issue: 4, Year: 2021

Keywords:

Seed rates , Allelopathy , Weeds , Kernel yield , Sorghum extract

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