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Larvicidal activity of Diplodia pinea extracts against Aedes aegypti

Numerous primary and secondary metabolites from fungi have been highlighted in the research due to the biological potential of their molecules, with direct application in the health area. Dengue is a pathology transmitted by a vector, the mosquito Aedes aegypti, and has great epidemiological relevance in several countries, including Brazil. As strategies of the Ministry of Health to combat and control dengue, t...

Avaliação da resistência de progênies de Eucalyptus grandis para mancha foliar ...

Use of potassium silicate for powdery mildew control in Eucalyptus benthamii se...

The effectiveness of potassium silicate (K2SiO3) to control powdery mildew was evaluated in Eucalyptus benthamii seedlings. Four treatments were applied: sprays of K2SiO3 (4 mL L-1) for 7 days, K2SiO3 (4 mL L-1) for 14 days, fungicide epoxiconazole + pyraclostrobin (6 mL L-1) for 14 days and ultrapurified water for 7 days. The experiment consisted of a randomized complete block design with three replicates, eac...

Fungi Present on Pinus taeda Needles in Early Stages of Decomposition in the Field

Knowing of the dependence between local area productivity, nutrient cycling and litter decomposition process, the knowledge of the mycobiota responsible for decomposition is the right way to obtain answers about forest’s productivity and nutrient’s demand. This study determined the fungal diversity during litter decomposition of needle of Pinus taeda in an experimental plantation with four years old, located at...

Fusarium disease on Pinus taeda seedlings

Nurseries has presented Pinus taeda seedling with symptoms of wilt, tip blight and death, in Southern Region of Brazil. Isolation on PDA medium, moist chamber, pathogenicity test and microculture were made to identify the pathogen. A species of Fusarium was isolated, which is under identification. It was verified by Koch postulates that Fusarium sp. was the causal agent of this disease.; Viveiros comerciais têm...

Selection of Fungicides for Control of Eucalypt Powdery Mildew

The objective of this study was to find effective fungicides against eucalypt powdery mildew. Fungicides tested were chlorothalonil, fenarimol, sulfur, tebuconazole, propiconazole, benzothiazole, pyraclostrobin + epoxiconazole and triadimenol. These fungicides were sprayed on Eucalyptus benthamii seedlings in a greenhouse infested with powdery mildew. Severity was evaluated at 9, 16, 23, 30 and 37 days after sp...

Insects associated to leaf rolling of Tabebuia spp. in nurseries and urban area...

Some Tabebuia species (Tabebuia alba, T. chrysotricha and T. heptaphylla) present deformed young leaves. A survey was performed randomly on young trees, from one month to  three years old in”Viveiro Municipal da Barreirinha” and  trees of urban areas of the Curitiba city, PR, Brazil. Small  twigs with symptoms were collected from each plant in  order to identify the associated insects, revealing the  presence o...

Impacts of diseases on eucalypts used for energy forests in southern region of ...

Eucalypts are the second forest species most planted in Southern Brazil, for production of cellulose, paper and energy. The continued expansion of commercial plantations in southern Brazil region has led to an increase on incidence and severity of diseases. The present work discusses the occurrence and distribution of diseases associated to this region, susceptible species, and causal agents. Strategies for con...

Fungal decomposition of needles in pine plantations

A literature review was performed to discuss the fungal decomposition of needle pines and impacts on commercial forest production and sustainability. Aspects as organic matter and litter degradation, associated micobiota, and factors that condition this process are discussed. Needles are principal components of residues in pine forests and their decomposition by fungi is important to nutrient turnover. Nutrient...

Methodology for sporulation and production of monoconidial isolates of Sphaerop...

Sphaeropsis sapinea is one of main pathogens that causes losses in commercial plantations of Pinusspp. Studies for control based on genetic resistance can be done by inoculating different monosporic isolates onpine populations and selectioning the resistant individuals. This work describes a methodology for pycnidia production in vitro and S. sapinea monoconidial cultures, using an agar-water medium with steril...