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São Paulo, Brazil

In order to assess the infestation and symptoms caused by Enneothrips flavens Moulton, 1941 (Thysanoptera: Thripidae), peanut plants variety IAC 513 were evaluated in field conditions during 2010/2011 season in Presidente Prudente, São Paulo State, Brazil. Adopted the completely randomized design with 4 repetitions. Leaves samples were collected at 17, 31, 41, 49, 59, 69, 80, 87, 96, 108, 117 and 129 days after emergence (DAE), for evaluating the adults and nymphs of E. flavens. The evaluation of symptoms was estimated by a scale from 1 to 5: Note 1 - leaves with absence of symptoms; Note 2 - leaves with a few scores silver; Note 3 - leaves with a few scores silver, starting winding of the edges of the leaves; Note 4 - the leaves scoring silver widespread, with the winding edges; Note 5 - the leaves scoring silver widespread, with shriveled total. The average data of twelve evaluations were subjected to analysis of variance by F test and means were compared by Duncan test which 5 % as probability. Data on numbers of nymphs and adults thrips were correlated to linear coefficient of Pearson, and also correlated with damage in leaves and subsequently analyzed by F test (P < 0.05). The damage analysis using scores showed no significant difference in reading highest score (1.76), held on 28/3 and the lowest (1.3) on 2/10/2011, differing from, with acme to 80 DAE. © 2014 Universidad de Tarapacá. Source

Fischer I.H.,APTA Centro Oeste Bauru | de Almeida A.M.,APTA Centro Oeste Bauru | Bertani R.M.A.,APTA Centro Oeste Bauru | de Arruda M.C.,APTA Centro Oeste Bauru | Bueno C.J.,APTA Instituto Biologico
Revista Brasileira de Fruticultura | Year: 2010

The low productivity of yellow passion fruit is often due to the phytosanitary problems, being the Collar rot caused by Nectria haematococca, one of the main problems in the majority of the producing States of Brazil. The disease control is basically preventive, avoiding the introduction of the pathogen in the area. So, the present work aimed at: a) evaluating the behavior of ungrafted yellow passion fruit cultivars 'Afruvec', 'IAC 275' and 'Maguary' passion fruit grafted on five Passiflora species (Passiflora alata, P. maliformis, P. morifolia, P. mucronata and P. suberosa) in an orchard where the disease is frequent; and b) evaluating the efficiency of chemical (copper oxychloride, prochloraz and thiabendazole) and biological products (Trichoderma harzianum and Trichoderma sp.) in the control of the Collar rot in 'Afruvec' yellow passion fruit in field conditions. Yellow passion fruit grafted on P. maliformis, P. suberosa and P. alata presented greater resistance to the Collar rot in relation to the ungrafted yellow passion fruit. The chemical and biological products applied to the base of plants (500 ml of volume) in monthly or biweekly intervals were not efficient in reducing the disease occurrence. Source

Azevedo Filho J.A.,APTA Polo Leste Paulista | Lucon C.M.M.,APTA Instituto Biologico | Duarte L.M.L.,APTA Instituto Biologico | Chaves A.L.R.,APTA Instituto Biologico | And 3 more authors.
Revista Brasileira de Plantas Medicinais | Year: 2011

The aim of the work was to evaluate the effect of leaf extracts of bougainvillea (Bougainvillea spetabilis L.) and of four o'clock flowers (Mirabilis jalapa L.) plants and Trichoderma spp., alone or in combination, on viruses management and lettuce production. The tests were conducted in a producing area in Pinhalzinho-SP. The experimental design was randomized blocks with ten treatments in comparison with conventional chemical control. Reductions of 18% and 32% in the bacterial population of the lettuce rhizosphere treated with IB18/22 isolate and bougainvillea extract + Trichoderma spp. isolates, respectivelly, were observed. Four o'clock plant leaf extract stimulated growth of CFU / g number of fungi population. However, no significant change in fresh mass and size of lettuce was observed, and despite the inoculum pressure and high population density of virus vector insects in place, the occurrence of viruses was not found, except for big-vein syndrome which was higher in control than in treated plants. Economically, 27.8% net profit and 38.5% gross profit margin were verified, indicating that the use of ecological tools in lettuce crops is feasible. Moreover, the products are easy to obtain, safe to apply and safe for environment and human consumption. Source

Montes S.,Paulista Agency of Technology Agrobusiness | Raga A.,APTA Instituto Biologico | Boliani A.,Paulista University | De Carvalho Mineiro J.,APTA Instituto Biologico | Dos Santos P.,Paulista University
Journal of Plant Protection Research | Year: 2011

The objective of this study was to characterize the diversity of phytophagous and predatory mites on peach cultivars either with or without fungicide treatment, in the city of Presidente Prudente, State of São Paulo, Brazil. In order to evaluate the effect of fungicides, leaf samples were colleted at random from treated and untreated plants of the Tropical, Aurora 1 and Aurora 2 cultivars, from June 2004 to February 2006. From the results obtained it can be concluded that: plants with or without treatment showed high populations of predatory mites, indicating that the treatments were innocuous on the mite populations. A diversified composition of the mite community was observed. The Phytoseiidae family had the highest richness in numbers and species of mites. Euseius citrifolius and E. concordis were the most abundant species. Plants with or without treatment had high abundances of predatory mites, with a predominance of E. citrifolius. Source

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