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Assessment of bio-agent (Trichoderma Harzianum) in the management of two pepper varieties infected with root-knot nematode (Meloidogyne Incognita)

Abstract

Two field trials were carried out at the Teaching and Research Farm of the University of Ilorin in the 2012 and 2014 planting seasons to find out the effeciency of Trichoderma harzianum as a bio-control agent in controlling root-knot nematode (Meloidogyne incognita) in two pepper varieties (F1 Nikita and Gianfranco Fuscello). A 2 × 2 factorial design fitted into a randomized complete block design (RCBD) was used with 5 replications. The T. harzianum filtrate significantly increased plant height, number of leaves, and yield. The control showed higher root galling and soil nematode population. Varietal differences showed that F1 Nikita performed significantly better than G. Fuscello. The combination of Trichoderma and F1 Nikita appears effective for managing root-knot nematodes.

Open access
The behaviour of some hyacinth varieties in forced culture

Abstract

This paper presents the behaviour of five hyacinth varieties: ‘City of Haarlem’, ‘Blue Jacket’, ‘Miss Saigon’, ‘Jan Boss’, and ‘Double Prince of Love’ in forced culture under the influence of different culture substrates. For this purpose, the following parameters were monitored concerning the main characteristics: number of flowers from inflorescence, length of stem flower, earliness of flowering period, and the flowers’ blooming period. The results of this work show that in culture substrate garden soil and sand (1:1) the best results were obtained regarding the length of the floral stem, number of flowers from inflorescence, and flowering period, and less favourable results were obtained for bloom precocity.

Open access
Breeding Biology of Booted Eagle Hieraaetus Pennatus (Gmelin, Jf, 1788): The First Study in North Africa

Abstract

Knowledge and study of breeding birds’ biology is essential to understand the dynamic, assess productivity and identify threats. The population of booted eagles (Hieraaetus pennatus) was studied during three consecutive breeding seasons (2013−2015) in the Chettabah forest. Each year, arrivals of Booted eagles are recorded during March (15 individuals in 2013, 12 in 2014 and 11 in 2015). For the three years of study, the mean breeding pair’s density was 1.23 ± 0.153/km2, incubation period ranged from 33 to 38 days, whilst the frequency distribution of clutch size was 67.6% for 2 eggs, 27% for 1 and 5.4% for 3. Amongst the 63 eggs monitored, 55 hatched. No significant variation in hatching rate was observed during the 3 years (90% in 2013, 76.19% in 2014 and 84% in 2015). The comparison of breeding parameters with those reported in Spain showed a noticeable similarity. Further investigations should be conducted to improve the provision of information to support sound management interventions of this North African population.

Open access
Changes in germination parameters of seven sweet basil (Ocimum basilicum L.) varieties due to treating with gibberellic and ascorbic acids

Abstract

During the study, the seeds of seven sweet basil cultivars were treated with 100 ppm solutions of gibberellic acid or ascorbic acid prior to a 14-day germination experiment. Values of the first day of germination, germination energy, germinability, mean time and rate of germination, and uncertainty and synchrony of germination were calculated. The results show that both of the substances altered the measured parameters, priming with gibberellic acid proving to be a more effective way to enhance the germination of basil seeds. Also, they revealed major differences among the germination parameters of the examined cultivars.

Open access
Changes in Snowbed Vegetation in the Western Carpathians Under Changing Climatic Conditions and Land Use in the Last Decades

Abstract

Snowbed vegetation is one of the most sensitive alpine vegetation type to the climate change, because shortened period of snow cover has essential impact on the snowbed environment. We focus on its changes in the Western Tatras, which is a part of the Western Carpathians (Slovakia). The assessment of changes in snowbed vegetation is based on the method of pair comparison. In 2016–2018, we resampled 21 historical phytocoenological relevés of Festucion picturatae and Salicion herbaceae alliances from 1974 and 1976. Historical data include 45 species, while recent data include 50 species. We observed a decrease in the frequency of species characteristic for snowbeds and, on the other hand, an increase in that for strong competitors, especially grasses and small shrubs from adjacent habitats. According to Ellenberg’s ecological indices, there is some increase in temperature and decrease in light ecological factors in snowbed habitats. In S. herbaceae data, a statistically significant increase in the average species number was observed with new species that penetrated from the adjacent habitats. Changes in species composition between historical and recent data are confirmed by Non-metric multidimensional scaling (nMDS) ordination diagram. Linear mixed-effect models showed big variability in factors that have impact on phytodiversity; nevertheless, temperature is the most significant factor.

Open access
Children–plant interaction using therapeutic horticulture intervention in a Romanian school

Abstract

Nature, childhood, and ecopsychology can to be connected in the landscape of a schoolyard. The landscape architecture of the natural environments serves as a wide-open green space for outdoor activities, creating imaginative and inventive urban environmental layouts and connecting natural elements. School-based green experience, either indoor or outdoor, can be a physical and mental activity for children. In the case of individuals, it makes` easy to access a natural, green environment and to be actively involved in a natural setting, developing either social and/or cognitive functions and improving concentration and creativity. Therapeutic horticulture activity, such as planting indoor plants, can be a good experience for developing team work, the proprioceptive (kinase) receptors, affectivity, socialization, permanent care, and responsibility. The potential benefits of ornamental plants for children involved in public education include spending time in outdoor spaces, fresh air and sunshine, experiencing a sense of control, and being exposed to sensory stimulations. Physical and psychological education based on therapeutic horticulture activities in Romanian schools, such as planting and green care, can provide important opportunities for children to develop their attachment to nature, offering sustainable education solutions to an active part of the natural environment.

Open access
Critical approach to landscape-ecological mainstream topics

Abstract

Nowadays, changes in environment have become characteristic of notorious mainstream political topics, with a corresponding moral, political, and financial support. The presented article deals with the landscape-ecological scientific aspects of climatic changes and of ecosystem services. The research of both phenomena is based on the complex investigation of the geosystem and, as a second step, on the scientifically-based interpretation of the obtained results. The problem resides in the question concerning the capability of scientific institutions and teams to deal with these topics with scientific profoundness, taking into account intensive public pressure and high expectations.

Open access
Evaluation of industrial tomato genotypes in open-field production

Abstract

Recently, industrial tomato production in Hungary shows an increasing tendency after a weak processing period. However, to maintain the cultivation profitable, the use of proper technology and genotype is indispensable.

In the experiment, five hybrids and one variety were evaluated in a plot experiment design on open field. The main objective was to evaluate the fruit quality of different genotypes and to determine the suitability for mechanical harvest.

According to the results, Heinz 1015 F 1 and Heinz 9478 F 1 had the best fruit quality for industrial processing.

Nowadays, the use of hybrids with good adaptability and resistance properties is important for a profitable production.

Open access
First molecular identification of wheat seed gall nematode Anguina tritici races parasitized on wheat in Iraq

Abstract

This study was conducted to identify races of wheat seed gall nematode Anguina tritici by using molecular identification for this nematode species parasitized on durum and bread wheat cultivars. Wheat seed galls of both cultivars were collected from two cities, Erbil and Duhok, from the Kurdistan Region and Iraq respectively. DNA was extracted from both nematode isolates (populations), and then PCR reactions were performed with Internal Transcribed Spacer (ITS) region using primers TW81/AB28 with 2 µl of template DNA of A. tritici for both nematode isolates on both wheat cultivars. The bands of both amplification products of PCR reactions were visualized in position about 800 bp on agarose gel, which indicates that both isolates of A. tritici belong to the same race. On the other hand, no nucleotide differences were observed between the two nematode isolations, as revealed by the sequence alignment of DNA of the internal transcribed spacer (ITS) region and phylogenetic tree, which emphasizes at the same time that both nematode isolates are of the same genetic structure or have the same identity and confirms their belonging to the same nematode race.

Open access
Fitting Competing Models of the Population Abundance Distribution: Land Snails from Nikopol Manganese Ore Basin Technosols

Abstract

This paper examines the temporal dynamics of terrestrial mollusks of the Nikopol manganese ore basin technosols. The research was carried out at the Research Centre of the Dnipro Agrarian and Economic University in Pokrov (Ukraine). Sampling was carried out in 2012–2014 on four variants of artificial soil: formed on red-brown clays, on loess-like loams, on gray-green clays, and on humus-rich layer. The distribution of the number of individuals in a mollusk population was described by broken stick, Motomura, log-normal, Zipf, and Zipf-Mandelbrot models. It was shown that the series of models that best describe mollusk abundance distribution is specific for a particular species and technosols type and generally is invariant over time.

Open access