| effect of air humidity on the egg viability of predatory mites (acari: phytoseiidae, stigmaeidae) common on rubber trees in brazil. | rubber pest mites, calacarus heveae and tenuipalpus heveae, reach economic damage levels at the end of the rainy season and the beginning of the dry season in brazil. therefore, low humidity adaptation might be an important characteristic for predatory mites to successfully control pest organisms. this study determined the effect of the relative humidity (rh) levels of 30-100% on the hatching of larvae of amblyseius acalyphus, euseius citrifolius, iphiseiodes zuluagai, metaseiulus camelliae, agi ... | 2006 | 16550332 |
| initial screening of little known predatory mites in brazil as potential pest control agents. | the objective of this study was to evaluate the oviposition rate and the survivorship of some of the most common predators on plants of the natural vegetation of southeastern brazil, when confined with different food sources. forty-four laboratory tests were carried out, each corresponding to a different combination of predator species and food source. the predators tested were: phytoseiidae--amblyseius acalyphus, euseius citrifolius, iphiseiodes zuluagai, metaseiulus (metaseiulus) camelliae, ty ... | 2006 | 16770686 |
| [diversity and seasonal occurrence of mites (acari) in a rubber tree crop (hevea brasiliensis, muell. arg.) in northwestern são paulo, brazil]. | brazilian southeastern region has soil and climate conditions suitable for the growing of rubber trees, and most part of national yield arises from são paulo state. the aims proposed for this work were to determine the diversity, the richness and the seasonal occurrence of mites found in a rubber tree crop in a triennial survey with monthly samplings, as well as to estimate the populational density of the major phytophagous species. this study found 74,407 mites from 26 species belonging to 10 f ... | 2006 | 17061803 |
| mites (acari) of rubber trees (hevea brasiliensis muell. arg., euphorbiaceae) in piracicaba, state of são paulo, brazil. | this study determined the main mite species on rubber trees (clone rrim-600) in piracicaba, southeast of são paulo state, from june 2002 to may 2003 and evaluated the possible relation between them. it was conducted in a plantation of 5 ha on 11 year old trees, 15 m high, surrounded with crops as pearl millet, cotton, bean or corn. samples were taken monthly and consisted of five leaflets, five petioles (only from october 2002 on) and five terminal sections of twigs (10 cm) from 15 rubber trees. ... | 2006 | 17352076 |
| [mites (acari) from rubber trees (hevea brasiliensis muell. arg., euphorbiaceae) and spontaneous euphorbiaceous in rubber trees cultivation]. | quarterly samples were done in 2001 on three rubber tree plantation in the northwest of the state of são paulo. three rubber trees of each locality were sampled. between the rows of rubber tree four species of spontaneous euphorbiaceous were collected: chamaesyce hirta, c. hyssopifolia, euphorbia heterophylla and phyllanthus tenellus. a total of 8.954 mites of 38 species, belonging to 31 genera of 11 families were collected. tydeidae and phytoseiidae had the highest diversity of species, 9 and 7 ... | 2008 | 18813750 |
| sequential sampling plan for tenuipalpus heveae baker (acari: tenuipalpidae) on rubber tree. | the objective of the present study was to develop a sequential sampling plan for the decision-making process to control tenuipalpus heveae baker (acari: tenuipalpidae), an important pest of the rubber tree crop. the experimental area was represented by 1,000 plants of the rrim 600 clone divided in 100 plots with 10 plants each. leaves were collected and the number of mites determined under laboratory conditions. the sequential sampling plan was developed in accordance with the sequential test li ... | 2013 | 23949755 |
| population fluctuation and damage caused by phytophagous mites on three rubber tree clones. | our aim was to investigate the population fluctuation and the damage caused by the phytophagous mites calacarus heveae feres, tenuipalpus heveae baker, and eutetranychus banksi (mcgregor) on clones fx 2784, fx 3864, and mdf 180 in rubber tree crops from southeastern bahia, brazil. moreover, we tested for the influence of climatic variables on occurrence patterns of these species throughout weekly samples performed from october to april. the infestation peaks was between mid-january and late febr ... | 2013 | 23949718 |
| [spatial distribution of tenuipalpus heveae baker (acari: tenuipalpidae) on rubber tree plantations]. | the objective of this work was to study the spatial distribution of tenuipalpus heveae baker in rubber tree plantations. the experimental area was located in marinópolis, state of são paulo, and corresponded to a total of 1,000 plants (clone rrim 600) divided in 100 plots of ten plants each. a total of 16 samplings were conducted, approximately once every 10 days, between december 2007 and june 2008. on each date, samples were taken from two plants per plot, each sample corresponding to the top ... | 2010 | 21120376 |
| life cycle and behaviour of the predaceous mite cunaxatricha tarsospinosa (acari: prostigmata: cunaxidae). | life cycle and behaviour of cunaxatricha tarsospinosa castro & den heyer from rubber trees in brazil were studied, with tenuipalpus heveae baker offered as prey.the study was conducted at 25.4 +/- 0.2 degree c, 83 +/- 5% rh and 12:12 h l:d photophase. the egg stage was the longest immature stage, lasting 17.1 +/- 1.3 days (mean +/- se); total juvenile development was completed in 33.2 +/- 2.8 days. lifetime fecundity was 12.0 +/- 2.2 eggs. intrinsic rate of population increase was low, suggestin ... | 2010 | 19757099 |
| seasonality of pathogenic fungi in mites of rubber tree plantations adjacent to fragments of cerrado. | fungi are the most frequently observed pathogens of mite populations, helping to control them on different crops. twenty-five samples of leaves were collected from rubber tree plantations adjacent to two fragments of cerrado vegetation. each rubber tree plantation had 25 plants selected for sampling and seven leaves from around each tree top were collected up to seven to eight meters above ground. approximately 250 individuals of calacarus heveae feres, phyllocoptruta seringueirae feres, and ten ... | 2008 | 18833474 |
| [occurrence and fluctuation of mite populations associated with rubber tree crop neighbor of fragments of cerrado]. | the basic knowledge of the seasonal occurrence of mites can supply data for elaboration of programs of ecological management to be implanted with success in the future. the objective of this study was to determine the species richness and the seasonality of mites present in two areas of rubber tree crops neighboring to native areas in itiquira, mt. along one year, 25 quantitative samplings were accomplished in rubber tree crop neighboring to two fragments of cerrado (cerradão and mata ripária). ... | 2007 | 17420870 |
| mites (arachnida: acari) collected on rubber trees hevea brasiliensis (willd. ex a.juss.) müll.arg. in santana, amapá state, brazil. | the purpose of this study was to elaborate a preliminary list of the mite species associated with rubber trees in the municipality of santana, in the state of amapá, brazil. two collections of rubber tree leaves were conducted on may 2nd and june 5th , 2010. twenty-five plants were sampled at random. three leaves were collected per plant, from the lower third of the crown. the samples were placed in paper bags, packed in an isothermal box chilled gel-based pulp plant (gelo-x(®)), and transported ... | 2012 | 23295522 |