Enhancing maize production in a Striga infested environment through weed management practices, sowing date and improved crop varieties

Abstract

A two-year investigation into the effects of weed management practices, sowing dates and maize varieties was made in a Striga endemic field at Minna, Nigeria. The treatment was a factorial combination of variety (SAMMAZ 15, 17, 37, 40 and SUWAN-1-SR-Y), weed management practices (weedy check, two hoe weeding (HW) at 3 + 6 weeks after sowing (WAS), pre-emergence (PE) Atrazine at 2.4 kg a.i ha-1 + 1 HW at 6 WAS and PE Atrazine at 2.4 kg ha-1 + post-emergence (POE) Nicosulfuron at 0.06 kg ha-1 at 6 WAS) and sowing dates: early (28 th May), mid-season (18 th June) and late-season (9 th July) in 2018 and early-season (26 th May), mid-season (16 th June) and late-season (7 th July) in 2019 laid in a split plot arranged in a randomized complete block with three replications. Maize variety and weed management practices were combined as the main plot and sowing dates constituted the subplot. Delayed Striga shoot emergence and reduced shoot density were observed in SAMMAZ 15 and 40 and higher grain yield with SAMMAZ 17 in 2018 and 2019. Application of Atrazine plus Nicosulfuron significantly delayed Striga shoot emergence, reduced shoot density and higher maize grain yield in both years. Sowing in May significantly delayed Striga shoot emergence and reduced shoot density in both years. Sowing in June significantly increased maize grain yield in 2018 and 2019. These results suggest that SAMMAZ 15 and 40 in combination with PE Atrazine at 2.4 kg a.i ha-1 and POE Nicosulfuron at 0.06 kg a.i ha-1 and sowing in May effectively reduced Striga infestation. SAMMAZ 17 in combination with PE Atrazine at 2.4 kg a.i ha-1 and POE Nicosulfuron at 0.06 kg a.i ha-1 and sowing in June increased maize grain yield.

Evaluating the compatibility of highland sorghum {Sorghum Bicolor (L.) Moench} varieties for relay-intercropping with chickpea [Cicer Arietinum (L.)] at highland areas of west Hararghe, Ethiopia

“…The highest grain yield of sorghum due to relay-intercropping could be due to complementarity between sorghum and chickpea. This idea is agreed with the finding of Aliyu and Emechebe (2006) [2] who revealed that higher grain yield may be attributed to the effectiveness of cropping system. Another reason for this also could be due to efficiently use of growth resources and conversion ability to the grain yield.…”

Evaluating cover crops forage nutritive value in Oklahoma winter wheat systems

“…This superior CP concentration in Perkins' PM+MB mixture reinforced Horn et al ( 2020) assumption that N fixation by mung beans enhanced soil N availability for pearl millet development in N-deficient soils (like Perkins). Other studies also reported that planting legumes with pearl millet improved grass crop development in N-limiting environments in Africa (Gbèhounou & Adango, 2003;Aliyu & Emechebe, 2006).…”