Estudo de repelência com diversos produtos de origem natural em operárias de Apis mellifera em semi-campo

Accidents involving insects of the Hymenoptera order occur very often with both human beings and domestic pets and, in Brazil, they include aggravated cases with Africanized bees (Apis mellifera). The aggravation of deforestation and the lack of awareness regarding the subject are factors that contribute to the rise of the number of bees in the urban environment. This fact has been causing several derangements among the population because, once these insects are bothered, they become very aggressive. Considering the risks to population and the great amount of accidents that could be avoided, the development of researches with the goal of determining repelling substances is rather important. Therefore, this research evaluated the repelling action of essential natural oils obtained from rosemary (Rosmarinus oficinalis), lemongrass (Cymbopogon citratus), thyme (Thymus vulgaris), cedar (Juniperus virginiana), clove (Syzygium aromaticum) and mint (Mentha piperita) on A. mellifera Africanized worker bees in both semi-field and aggressiveness tests. Among the evaluated composites, the lemongrass, mint and clove essential natural oils presented a grater repelling effect, inhibiting the bees’ visitation to the managed feeders almost completely. The cedar essential natural oil was the least effective composite, and the rest of the tested oils presented satisfactory repellency, which became less effective over time, according to non-parametric Mann-Whitney test. However, further tests showed that only the lemongrass essential natural oil caused a less aggressive response from the bees, which can confirm the repelling power of this composite. This way, according to the results obtained through this research, lemongrass presents a greater potential to the development of effective repelling formulas against Africanized bees (Apis mellifera)

Considerações gerais sobre a aplicação de esterco no processo de compostagem dos resíduos de poda e capina

In the category of the solid waste, are included the yard solid waste, this kind of solid waste are noble raw material and uncontaminated being recycled through the composting processing. Inside this context, it was studied the influence of horse manure in yard solid waste composting process, analyze the viability to compost the yard solid waste in UNESP Bela Vista. It was made four piles of composting, two of them are composed only by yard solid waste and the others are composed by horse manure and yard solid waste. The experiments were operated during 45 days. The evaluation of the process was made through temperature measurements of the piles daily during the test period. On the contrary of the piles with horse manure, the piles with no horse manure didn’t undergo complete maturation in the end of the experiment. Through the results obtained concluded that it was important to use manure horse in yard solid waste composting process to accelerate this process, because the piles without horse manure didn’t reach temperatures that characterize the composting process.

Efeito da aplicação de água residuária de graxaria em elementos químicos do solo e na produção e composição mineral de duas espécies forrageiras

Pós-graduação em Agronomia (Ciência do Solo) - FCAV

Compósitos de nanocelulose / PHBV: manta microfibrilica por eletrofiação

Pós-graduação em Engenharia Mecânica - FEG

Vivendo nos interstícios do Cerrado: encurralados entre o agronegócio e Unidades de Conservação

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Avaliação de diferentes técnicas de manejo para o controle de gramíneas invasoras em unidade de conservação de cerrado

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação do efeito do citral na dor neuropática e na inflamação

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Sistemas de cultivo com milho e braquiária e nitrogênio em cobertura no feijoeiro em sucessão no plantio direto

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

Efeito antimicrobiano e citotóxico do óleo essencial de Cymbopogon citratus sobre células odontoblastóides

The aim of this study was to evaluate the antimicrobial and cytotoxic effect of essential oil (EO) of lemon grass (Cymbopogon citratus). From the agar diffusion method, different concentrations of EO (0.135%, 0.2% and 1%), and control solutions (chlorhexidine (Chx), distilled water (Ad) and cereal alcohol (Ac)) were applied on cultures of Candida albicans (C.a), Streptococcus mutans (S.m), Streptococcus sobrinus (S.sob) and Lactobacillus acidophilus (L.a). For C.a, S.m and S.sob, the largest inhibition zones in descending order were: Chx, Ac and EO 1%, while the latter two were statistically similar (Mann-Whitney, p> 0.05). For L.a, the largest inhibition halo was observed for the Chx, followed by EO at 1%, 0.2%, 0.135% and Ac. For evaluation of cytotoxicity, the following groups were set: G1: 0,1% EO; G2: pure EO; G3 (positive control): H2 O2 ; G4: cereal alcohol; and G5 (negative control): culture medium – DMEM. The solutions were applied on the cultured MDPC-23 cells, which were plated (30,000 cells/cm2 ) in wells of 24 well-dishes. Cell metabolism was evaluated by MTT assay. Considering G5 (negative control) as 100% of cell metabolism, it was observed for G1, G2, G3 and G4 a percentage reduction in cell metabolism of 29.6%, 82%, 81.2% and 33.4%, respectively. It was concluded that the low concentration of 0,1% OE (C. citratus) was able to inhibit the growth of the strains tested as well as caused mild cytotoxicity to the cultured MDPC-23 cells.

Parcelamento da adubação nitrogenada no feijão em sucessão a sistemas de cultivo com milho e Urochloa ruziziensis em plantio direto

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

Eficácia de óleos minerais aplicados como adjuvantes auxiliando na selitividade de herbicidas na cultura de cana-de-açúcar

Pós-graduação em Agronomia - FEIS

Parâmetros ruminais e produtivos de cabras alimentadas com raspa de mandioca em substituição ao milho

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Performance and parasite control of different genetic groups of lambs finished in irrigated pasture

The aim of this study was to compare the following four genetic groups of hair sheep: Santa Inês (SI), Morada Nova (MN), Brazilian Somali (BS), and the F1 1/2Dorper x 1/2Morada Nova crossbreed on traits related to growth and parasitic infection. Thirty-three male lambs of the same age and of simple birth, under the same pre-weaning management conditions were used in the experiment. After weaning the animals were housed in a completely randomized design in paddocks made of Panicum maximum cv. Tanzania. Along the course of the research, the performance of the four groups of sheep was observed to be negatively affected by gastrointestinal parasites, but there was a genotype effect to the average daily weight gain (ADWG), where the SI and F1 genotypes presented higher values. The effects of genotype, time and genotype x time interaction were significant in weight and corporal score (CS) measurements. The BS lambs had the highest CS values throughout the experiment despite not presenting greater weight gain when compared to the SI and F1 breeds. There were also significant effects of time and genotype x time interaction for packed cell volume (PCV) and FAMACHA© score (FAM) and only the time effect was significant in the total number of eggs per gram (EPG) and total plasma protein (TPP). The MN lambs showed higher PCV values and unlike the other groups, presented a FAMACHA© score below 3 and PCV above 23% even having a higher EPG tendency, especially in the initial phase, indicating a possible higher resilience to infection caused by gastrointestinal parasites.

Efeito do adubo orgânico na diversidade bacteriana de solos

Pós-graduação em Microbiologia Agropecuária - FCAV

Interferência de plantas daninhas no desenvolvimento inicial de mudas meristemáticas de cana-de-açúcar

Pós-graduação em Agronomia (Produção Vegetal) - FCAV