Open Access Short communication

Henosepilachna vigintioctopunctata (Coleoptera: Coccinellidae: Epilachninae) Attacking Cultivated and Wild Crops in Brazil

Ronilda Lana Aguiar, Grazielle Moreira Furtado, Caio Henrique Binda Assis, Patricia Miler Mulinário, Tatiane Pereira Cofler, Anderson Mathias Holtz

Journal of Experimental Agriculture International, Page 1-4
DOI: 10.9734/jeai/2019/v39i530347

Henosepilachna vigintioctopunctata was recorded on Solanum melongena L. for the first time in cultivated crops areas in Espirito Santo State, southeastern Brazil, in the first semester of 2017. In one-year research, H. vigintioctopunctata was recorded in eight host plants of the families Amaranthaceae and Solanaceae.  These new records represent a high potential  establishment of this pest in Brazil.

Open Access Original Research Article

Toxicity of Insecticides in Duponchelia fovealis Zeller (Lepidoptera: Crambidae), a New Strawberry Pest in Brazil under Laboratory Conditions

Francieli Marcelino dos Santos, José Romário de Carvalho, Dirceu Pratissoli, Regiane Cristina Oliveira de Freitas Bueno, Victor Dias Pirovani, Hígor de Souza Rodrigues

Journal of Experimental Agriculture International, Page 1-7
DOI: 10.9734/jeai/2019/v39i530344

The strawberry caterpillar, Duponchelia fovealis Zeller (Lepidoptera: Crambidae) was recently found in Brazil causing significant losses for this crop. Because it is a recent pest in the country, still, there is no record of insecticides for its control. Thus, this work evaluated the toxicity of different commercial insecticides on D. fovealis second instar caterpillars. The insecticides tested were: acetamiprid, cyromazine, thiamethoxam + lambda-cyhalothrin, milbemectin, chlorantraniliprole, lambda-cyhalothrin, thiamethoxam, fenpropathrin, alpha-cypermethrin, chlorfenapyr, indoxacarb, and lambda-cyhalothrin + chlorantraniliprole. The application was carried out by spraying the caterpillars in a Potter tower. Insecticides indoxacarb, lambda-cyhalothrin + chlorantraniliprole and chlorfenapyr provided mortality data of D. fovealis caterpillars from 70.9 to 100%, and could be considered as promising for the management of this pest, once duly registered with the Ministry of Agriculture, Livestock and Supply (MAPA).

Open Access Original Research Article

Allelopathy of the Melia azedarach L. Leaf Extract on the Germination of Three Selected Atlantic Forest Species

Magnólia Martins Alves, Renata Ranielly Pedroza Cruz, Manoel Bandeira de Albuquerque

Journal of Experimental Agriculture International, Page 1-7
DOI: 10.9734/jeai/2019/v39i530345

Allelopathy is a naturally occurring phenomenon that results in the release of chemicals capable of stimulating or inhibiting the development of other nearby plants. The objective of this work was to evaluate the allelopathic potential of Melia azedarach on the germination, seed index, length and dry mass of seedlings of three Atlantic Forest species. The treatments were distributed in a bi-factorial scheme consisting of 5 concentrations (0, 2.5, 5.0, 7.5 and 10%) and 3 species (Ceiba speciosa, Leucaena leucocephala and Samanea tubulosa), in four replicates of 25 seeds totaling 100 seeds for each treatment. The Tukey test at 1% was used to compare the means. For quantitative effects, a SISVAR polynomial regression analysis for Windows software version 4.6. The extracts were obtained from 100 mg of dehydrated and crushed leaves of M. azedarach in 1000 ml of distilled water. The sowing was carried out on germitest paper and the seeds kept germinating in germinators of the type Biochemical Oxigen Demand (BOD) at 25°C with photoperiod of 12 h. The germination, germination velocity index (GVI), length and dry mass of shoot and root were evaluated. The results obtained in the laboratory showed that the aqueous extract of leaves M. azedarach has an allelopathic effect on all studied species, reducing the percentage of germination, speed index, length and dry mass of seedlings.

Open Access Review Article

Fungi Associated with Major Agricultural and Forage Crops in Integrated Systems of Brazilian Tropical Regions

Anne Caroline Dallabrida Avelino, Dayana Aparecida de Faria, Lucas Dias de Oliveira, Yuri Nunes Cervo, Alexandre Secco Contreras Filho, Matheus Afonso Farinha, Onassis Henrique Simon Rondon, Joadil Gonçalves de Abreu, Wender Mateus Peixoto, Mariana Rossi, Jéssica Rodrigues

Journal of Experimental Agriculture International, Page 1-13
DOI: 10.9734/jeai/2019/v39i530343

Integrated production systems were developed to preserve productive resources and maintain the profitability of agribusiness. However, the use of seeds of low physiological and sanitary quality and the implantation of agricultural and forage crops in production fields of low sanitary quality may favor the dissemination and proliferation of phytopathogens such as fungi. Therefore, using the scientific literature, this work aimed to identify the fungi associated with the main agricultural and forage crops that cause damage to the integrated production systems of Brazilian tropical regions and their control measures. This work was based on a literature review in the Scielo, Scopus and Google Scholar databases, with data obtained between 1999 and 2019. The keywords employed were “fungus”, “tropical grass”; “agricultural crops”; “ICLS” (Integrated Crop-Livestock); and “ICLF” (Crop-Livestock-Forest) and their respective terms in Portuguese, under different combinations. For the inclusion criteria, publications (papers, books, theses, dissertations, and scientific communiqués) from 1999 to 2019 which fit the study aim were selected, both in the Portuguese and English languages. The publications that did not meet the criteria of this study and were repeated in databases were considered as exclusion criteria. The main fungi associated with forage and agricultural crops and soils of integrated systems of Brazilian tropical regions are Bipolaris sp., Curvularia sp., Exserohilum syn. Helminthosporium sp., Phoma sp., Fusarium sp., Macrophomina sp., Pythium sp., Rhizoctonia sp. and Sclerotium sp. The main methods of fungal control are the use of quality seeds, crop rotation, resistant cultivars, and chemical seed treatment.

Open Access Review Article

State of the Art: Soil Physical Attributes

Allan de Marcos Lapaz, Carolina dos Santos Batista Bonini, Gabriela Lozano Olivério, Tatiane Paes dos Santos, José Guilherme Chitero, Reges Heinrichs, Alfredo Bonini Neto, Camila Hatsu Pereira Yoshida, Nidia Raquel Costa, Jhonatan Cabrera Piazentin

Journal of Experimental Agriculture International, Page 1-12
DOI: 10.9734/jeai/2019/v39i530348

Proper soil management interferes in the result of the installed crop. The knowledge of the positive and/or negative influence on the production systems is essential to improve the physical, chemical and biological quality of the soil and, for that, there are some attributes that act as indicators of soil quality. Practices carried out improperly will result in problems in soil structure, such as compaction, lack of availability of water and air in the soil and for plants, soil loss among others. Some properties as soil porosity, aggregation, compaction, water infiltration are used to measure soil quality. Given this, the use of these attributes as indicators is of utmost importance for excellent productivity, since management practices can directly influence the development of plants.