XMM-Newton EPIC and OM observation of Nova Centauri 1986 (V842 Cen)

We report the results from the temporal and spectral analysis of an XMM-Newton observation of Nova Centauri 1986 (V842 Cen). We detect a period at 3.51$\pm$0.4 h in the EPIC data and at 4.0$\pm$0.8 h in the OM data. The X-ray spectrum is consistent with the emission from an absorbed thin thermal plasma with a temperature distribution given by an isobaric cooling flow. The maximum temperature of the cooling flow model is $kT_{max}=43_{-12}^{+23}$ keV. Such a high temperature can be reached in a shocked region and, given the periodicity detected, most likely arises in a magnetically-channelled accretion flow characteristic of intermediate polars. The pulsed fraction of the 3.51 h modulation decreases with energy as observed in the X-ray light curves of magnetic CVs, possibly due either to occultation of the accretion column by the white dwarf body or phase-dependent to absorption. We do not find the 57 s white dwarf spin period, with a pulse amplitude of 4 mmag, reported by Woudt et al. (2009) either in the Optical Monitor (OM) data, which are sensitive to pulse amplitudes $\gtrsim$ 0.03 magnitudes, or the EPIC data, sensitive to pulse fractions $p \gtrsim$ 14 $\pm$2%.Comment: 5 pages, 3 figures; MNRAS, accepte

Some phytoseiid mites from the South Pacific, with descriptions of new species and a definition of the Amblyseius largoensis species group.

Species of Phytoseiidae collected in Fiji, Vanuatu (New Hebrides) and New Caledonia in 1979 and Cook Islands in 1981 are listed. Amblyseius fijiensis n. sp. and A. herbicoloides n. sp. belong to the largoensis species group, which, as defined, comprises 9 species, 7 of which are Known only from the Southern Hemisphere. Amblyseius (Indoseiulus) hebridensis n. sp. is also described

Boll weevil in South America.

bitstream/item/145707/1/1994FL001-CAmpanhola-boll-2405.pd

Suitability of the spider mite Tetranychus evansi as prey for phytoseiulus persimilis.

Experiments conducted to evaluate the suitability of T. evansi as a source of food for P. persimilis revealed that the primary factor responsible for the low oviposition rate and vurvivorship of the predator when fed T. evansi was the low amount of food ingested. P. persimilis detected and initiated feeding on T. evansi equaly as well as on T. urticae. However, a feeding depressant was apparently responsible for a longer time spent by P. persimilis feeding on eggs of T. evansi than on eggs of T. urticae. Eggs of the former prey were totally consumed only occasionally. The depressant effect influenced subsequent feeding on T. urticae, increasing the time requered for consomption and the number of partially consumed eggs for at least 3 days

Perfil do produtor e manejo de pragas na microrregião de Dourados.

Perfil do produtor e manejo de pragas na microrregião de Dourados; Perfil do produtor; Administração da propriedade; Nível de escolaridade; Posse e uso da terra; Cultivo de grãos na propriedade; Cultura; Manejo de pragas; Equipamentos de pulverização.bitstream/CPAO-2010/32084/1/DOC2009102.pd

The invasive coconut mite Aceria guerreronis (Acari: Eriophydae): origin and invasion sources inferred from mitochondrial (16S) and nuclear (ITS) sequences.

Made available in DSpace on 2018-06-13T00:42:13Z (GMT). No. of bitstreams: 1 ID25692.pdf: 247771 bytes, checksum: cceff47d1569dbf5f1d208e840bd0b07 (MD5) Previous issue date: 2005-10-2

Behavior of three cowpea varieties in relation to leafhopper attack in Northeastern Brazil.

The cowpea varieties "Pitiuba", "Sempre Verde" and "VITA-3" have been tested in Petrolina, PE, northeastern Brasil, to observe their behavior in relation to the attack of leafhopper, Empoasca Kraemeri Ross and More. The first two are common, local varieties, whereas the third was recently introduced from Nigeria, where, reportedly, it is tolerant to Empoasca dolichi (Paoli)

Phytoseiid mites of Colombia (Acarina: Phytoseiidae).

This is the second report of the phytoseiids of Colombia. A new genus and species, Quadromalus colombiensis and Euseius ricinus n.sp. are described, bringing the total to 17 species of phytoseiids for Colombia