October 2015

Issues and constraints for emerging farmers in the Eastern Cape Province, South Africa

The aim of the study was to investigate the main limiting factors that prevent emerging farmers from progressing from subsistence to commercial agricultural farming in the Eastern Cape Province. The study was conducted in the King William’s Town area by means of a structured questionnaire survey. A sample of 50 households was drawn from the research area which was chosen owing to its uniqueness with regard to...

Author(s): Musa Khapayi⊃ and Phillip Retief Celliers⊃

October 2015

Postharvest fruit quality of new papaya tree hybrids produced in semiarid region

This work aimed to evaluate the new postharvest quality of papaya tree hybrids grown in a region of semi-arid climate, aiming to find the most suitable for marketing as new cultivars. It was conducted in a commercial farm in the municipality of Mossoró-RN, an experiment in a randomized block design with 14 treatments (12 hybrids in testing, plus two more cultivars already marketed, Tainung No. 1 and...

Author(s): Wallace Edelky de Souza Freitas, Hozano de Souza Lemos Neto, Francisco Irael de Souza, Patrícia Lígia Dantas de Morais, Divanovina Láis de Morais and Jaeveson da Silva

October 2015

Enhancing dissemination of Beauveria bassiana with host plant base incision trapfor the management of the banana weevil Cosmopolites sordidus

The banana weevil, Cosmopolites sordidus (Germar) (Coleoptera: Curculionidae) is an important pest of highland banana in East and central Africa. It causes yield loss of up to 100% in heavily infested fields. Studies were carried out in Uganda to evaluate the efficacy of the the plant base incision trap in attracting C. sordidus and to determine the potential of using the trap in enhancing dissemination of the...

Author(s): Tinzaara W., Emudong P., Nankinga C., Tushemereirwe W., Kagezi G., Gold C. S.,  Dicke M., Van Huis A. and Karamura E.

October 2015

Medium-term conservation and regrowth of the tropical multipurpose species Genipa americana

The Genipa americana L., a fruit-producing species found in several countries and commonly found in the Brazilian Northeast, is very important economically, both for its wood and as a source of food and dye. This study evaluate the effects of abscisic acid (ABA) and the concentrations of salt and sugar in MS medium on reducing Genipa americana L. growth for in vitro conservation, as well as the effects of...

Author(s): Ana da Silva Lédo, Camila Santos Almeida, Ana Veruska Cruz da Silva, Josué Francisco da Silva Junior and  Aparecida Gomes de Araujo

October 2015

Residuality of exogenous salicylic acid and effect on catalase activity and total antioxidant capacity in tomato leaves

Salicylic acid (SA) is used in agricultural practices because it induces stress tolerance. The goal of this study was to determine the SA concentration in leaves, the change in catalase (CAT) activity and the change in total antioxidant capacity (TAC) that result from the exogenous application of SA (10-4 M) to tomato leaves every 15 days in a greenhouse with and without NaCl application. Fruit yield was also verified....

Author(s): Enrique Guzmán-Téllez, Adalberto Benavides-Mendoza, Alberto Flores-Olivas, Marcelino Cabrera-De la Fuente and Daniel Díaz-Montenegro

October 2015

Adaptability and stability of cowpea genotypes to Brazilian Midwest

This study aimed to evaluate cowpea genotypes for adaptability and stability of grain yield using different methods, in order to support the launch and/or cultivars recommendation for agribusiness in the Brazilian Midwest. Trials were conducted from 2010 to 2012 in four locations, totaling eight environments. We evaluated 20 cowpea genotypes arranged in a randomized block design with four replications. Studies of...

Author(s): A.   Santos, G. Ceccon, E. V. Rodrigues, P. E. Teodoro, P. A. Makimo, V. B. Alves, J. F. Silva, A. M. Corrêa, R. C. F. Alvares and F. E. Torres

October 2015

Effects of alternative extracts in the agronomic performance of two soybean cultivars

The soybean cultivation along the years has required big investments and high technological level to develop new and more productive cultivars. However, the advent of biotic stress, such as diseases, can lead to losses in yield. To attenuate this interference and obtain the expected yield, chemical products have been used to control these diseases. This technique has shown good efficiency in short-term, but can damage...

Author(s): Pedro Oswald Morell, Vinicius Gabriel Caneppele Pereira, Fábio Henrique Krenchinski, Augusto Tessele, Alfredo Júnior Paiola Albrecht, Leandro Paiola Albrecht, Roberta Paulert and Caroline Thaís Eckert

October 2015

Sunflower behavior of on soils with water availability and addition of cattle biofertilizer

The Sunflower plant is an oilseed of great importance on the world stage. However, their productivity may be compromised by lack of rain and availability of nutrients. Thus this study aimed to evaluate the growth of sunflower plants under different hydric regimes in two soils with the application of cattle biofertilizer. The experiment was performed in a greenhouse State University of Paraíba campus IV in...

Author(s): Marcelo de Andrade Barbosa, Geffson de Figueredo Dantas, Evandro Franklin de Mesquita, Fernanda Ramalho Nascimento, Anselmo Ferreira da Silva, Francisco Vanies da Silva Sá and Rener Luciano de Souza Ferraz

October 2015

Temporal variation in weed occurrence and biomass under conservation agriculture and conventional farming practices

Conservation agriculture (CA) is advocated as a management system for sustainable productivity, while preserving the environment simultaneously. CA has many advantages, but weed management is regarded as one of its biggest challenges. This study reports on the temporal variation in weed occurrence and biomass under conservation and conventional farming practices. The treatment design was a split-split plot, with a...

Author(s): Corrie Maria Swanepoel, Johan Habig, Nicolene Thiebaut and Lourens Hendrik Swanepoel