Weed Persistence, Crop Resistance and Phytotonic Effects of Herbicides in Maize (Zea mays) Production Under Different Weed Control Method and Poultry Manure in Kano State Nigeria

The research is financed by centre for dry land Agriculture Bayero University Kano for providing financial support and the management of Agronomy Department Bayero University, for providing technical support throughout the duration of the study (Sponsoring information). Abstract Results of experiment conducted during rainy season of 2016 and 2017 at teaching and research farm of Bayero university Kano, Livestock development centre Dangora with two different pre-emergence herbicides and two post-emergence herbicides all applied at two different rates, (S-Metolachlor 290 g/l + Atrazine 370 g/l at 2.0 kg a.i. ha-1 followed by Nicosulfuron at 100 g a.i.ha-1, S-Metolachlor 290 g/l + Atrazine 370 g/l 2.0 kg a.i. ha-1 followed by Bentazone at 2.5 kg a.i. ha-1, Metolachlor 375 g/l + Terbuthylazine 125 g/l + Mesotrione 37.5 g/l at 2.5 kg a.i ha-1 followed by Nicosulfuron at 100 g a.i. ha-1, Metolachlor 375 g/l + Terbuthylazine 125 g/l + Mesotrione 37.5 g/l at 2.5 kg a.i ha-1 followed by Bentazone at 2.5 kg a.i. ha-1, Two hoe weeded at 3 and 6 WAS and weedy check) three levels of poultry manure (0, 4, and 8 t ha-1) and NPK at the rate of 120kg N, 60kg P and 60kg K ha-1 and three maize varieties (SAMMAZ 15, SAMMAZ 21 and SAMMAZ 35). The experiments was laid out in a split-split plot design with variety allocated to the main plot, poultry manure to the sub-plot and weed control method to the sub-sub plot, and was replicated three times. The result from the study showed that two hoe weeding at 3 and 6WAS and Application of 3Maizeforce at 2.5 kg a.i. ha-1 followed by Bentazone at 2.5 kg a.i. ha-1, significantly revealed higher crop resistance index with medium persistence index of the weeds indicating broad spectrum effect in controlling the weeds, the said treatments were best herbicides for maize production. Furthermore the said treatment is recommended for weed control that can improve maize grain yield. Keywords: Weed Occurrence level, Weed persistence index, Crop resistance index and Phytotonic effect. DOI: 10.7176/JBAH/10-10-03 Publication date:May 31st 202

Potential of genomic approaches in conservation of plant and animal biodiversity in Africa: A review

In Africa, status of biodiversity conservation of many plants and animals is questionable as this is considered to be caused by limited and lack of authentic information concerning genetic diversity. This has led to a considerable compromise of conservation decisions in Africa. As a result, lack of reliable information continues to cause a great effect on the long-term security of species of plants and animals. Current advancement in genomics has proved to play a vital role in conservation of plant and animal biodiversity. It produces genetic data that helps researchers to understand the interaction between ecosystem and organisms, also among organisms themselves. The information extracted from plants and animals via genomics techniques can be used to develop good approaches for biodiversity conservation. Despite its usefulness, there is a limited awareness on the application of potential genomics in plants and animals conservation in many developing countries, especially in Africa. The aim of this review is to raise awareness and catalyse the application of genomics techniques in rejuvenation and conservation of plants and animals in Africa. Precisely, the paper addresses the efficacy of potential genomics in plants and animals conservation; and seeks to show how Africa can benefit from genomics technology. About 62 peer-reviewed articles were reviewed. This current review has shown that genomics helps to identify good genes for fitness, and develops tools to monitor and conserve plants and animals biodiversity. The review recommends that regardless of the limitation of genomics application in biodiversity conservation in Africa, African researchers must consider using this technology for better conservation of plants and animals biodiversity

REVIEW - SEXUAL DYSFUNCTION IN HYPERTENSIVE PATIENTS: IMPLICATIONS FOR THERAPY

fe. Recent evidence suggests that losartan, an angiotensin II antagonist, is not typically associated with development of sexual dysfunction and may actually positively impact several indices of sexual function (erectile function, sexual satisfaction, and frequency of sexual activity) as well as perceived quality of life. Thus, angiotensin II antagonists may offer a therapeutic option to prevent or correct erectile dysfunction in patients with hypertension. The favorable effects of these agents on sexual function may be related, in part, to their ability to block angiotensin II, which has recently become recognized as an important mediator of detumescence and possibly erectile dysfunction

RESPONSE OF MAIZE (Zea mays L.) GENOTYPES GROWTH CHARACTERS UNDER DROUGHT AND HEAT STRESS CONDITIONS EVALUATED IN SUDAN SAVANNA, NIGERIA

Drought stress and heat stress are two major limiting factors affecting maize productivity in the tropical regions. High temperatures and changes in rainfall pattern can cause significant decline in maize yields under rain fed conditions with Africa being one of the worst affected areas. Heat tolerance can be accomplished through genetic management approach. The aim of the research is to assess the extent of variation in tolerance to drought stress and heat tolerant stress and their performance on growth and yield characters. The trials were conducted on genetic analysis of Maize (Zea mays L.) inbred lines under combined (drought and heat stress) conditions. The parental materials comprises eight inbred lines that were crossed in a partial diallel pattern; thereafter, the checks, parents and resultant F1 generations were evaluated at two locations, Kano University of Science and Technology and farmers field at Dambatta local government area Kano state during 2021 dry seasons. The experiment was laid out in a randomized complete block design and replicated three times. The results indicated the crossing of P4 X P9 and P3 X P4 to produce significantly to produce significantly better growth attributes like plant height ear height, plant aspect and grain yield. These parental lines might be used in maize breeding programs in Nigeria as sources of drought and or heat tolerance

RESPONSE OF MAIZE (Zea mays L.) GENOTYPES GROWTH CHARACTERS UNDER DROUGHT AND HEAT STRESS CONDITIONS EVALUATED IN SUDAN SAVANNA, NIGERIA

Drought stress and heat stress are two major limiting factors affecting maize productivity in the tropical regions. High temperatures and changes in rainfall pattern can cause significant decline in maize yields under rain fed conditions with Africa being one of the worst affected areas. Heat tolerance can be accomplished through genetic management approach. The aim of the research is to assess the extent of variation in tolerance to drought stress and heat tolerant stress and their performance on growth and yield characters. The trials were conducted on genetic analysis of Maize (Zea mays L.) inbred lines under combined (drought and heat stress) conditions. The parental materials comprises eight inbred lines that were crossed in a partial diallel pattern; thereafter, the checks, parents and resultant F1 generations were evaluated at two locations, Kano University of Science and Technology and farmers field at Dambatta local government area Kano state during 2021 dry seasons. The experiment was laid out in a randomized complete block design and replicated three times. The results indicated the crossing of P4 X P9 and P3 X P4 to produce significantly to produce significantly better growth attributes like plant height ear height, plant aspect and grain yield. These parental lines might be used in maize breeding programs in Nigeria as sources of drought and or heat tolerance

CORRELATION AND PATH COEFFICIENT ANALYSIS BETWEEN GRAIN YIELD AND SOME GROWTH AND YIELD COMPONENTS OF MAIZE (ZEA MAYS L.) GENOTYPE AS INFLUENCED BY DROUGHT AND HEAT STRESS CONDITIONS IN SUDAN SAVANNAH OF NIGERIA

Experiments were conducted at the Teaching and Research farm of the Department of Crop Science Kano University of Science and Technology, Wudil and on a farmer’s field at Dambatta Local Government Area, with eight maize genotypes to assess the character associations among the genotypes for yield attributes. The experiment was conducted during February to June 2021 and also 2022, in a lattice design with three replications in both years and locations and are made to determine the performance of the genotypes in interacting environments. The genotypes differed significantly for most of the studied traits. Grain yield was significantly associated with plant height, anthesis silking interval, days to maturity, ear height, ears per plant, grain weight per plant in a positive direction and associated negatively with tassel blast, barren plant and leaf senescence. Path co-efficient analysis revealed that the maximum positive direct contribution towards yield was through grain weight per plant, plant height, and ears per plant whereas ear height showed negative direct contribution to grain yield due to negative indirect effects of several other parameters such as ear height via grain weight per plant, plant height via grain weight per plant