Padrão de sobrevivência e efeito na reprodução de Planococcus citri (Hemiptera: Pseudococcidae) após o parasitismo de Coccidoxenoides perminutus (Hymenoptera: Encyrtidae).

Este trabalho teve como objetivo verificar o padrão de sobrevivência de P. citri após o parasitismo de C. perminutus sobre ninfas do 2° e 3° instar, bem como em fêmeas nos estágios pré-reprodutivo e reprodutivo

Host plants for mealybugs (Hemiptera: Pseudococcidae) in grapevine crop.

Mealybugs (Hemiptera: Pseudococcidae) are considered pest insects of economic importance in grapevine crops. They are highly polyphagous, feeding on host plants of about 250 families. This study aimed to identify host plants for mealybugs in grapevinecrops, in the São Francisco Valley region, Brazil. The samples included weeds, ornamentals, windbreaks, fruit trees and native plants of the Caatinga biome. A total of 37 species of host plants for mealybugs were identified, distributed in 18 families. The Malvaceae family was the most frequent one, with eigth host species identified, followed by Fabaceae with four and Euphorbiaceae with three. Most of these host plants are being recorded here for the first time in association with mealybugs species. From the identified plant species, 24 are hosts for Maconelicoccus hirsutus, 16 for Phenacoccus solenopsis, one for Ferrisia virgata, one for Dysmicoccus brevipes and one for Planococcus citri. The obtained results are important to better understand the host plant diversity for mealybugs, in order to implement integrated pest management programs

Divergência entre acessos de tucumanzeiro por caracteres da inflorescência.

O Astrocaryum vulgare, Mart. popularmente conhecido como tucumã, é uma palmeira comumente encontrada nos estados da região norte do Brasil, onde seus frutos são bastante apreciados na culinária local e mais recentemente como matéria prima na produção de biocombustível. Estudos quanto à domesticação e utilização desta planta, ainda são escassos. Objetivou-se avaliar a divergência entre acessos de tucumanzeiro por caracteres da inflorescência. Foram coletadas inflorescências de 29 acessos conservados no Banco Ativo de Germoplasma da Embrapa Amazônia Oriental para a avaliação de doze caracteres. Os caracteres foram submetidos a análise de multivariada. O caráter número de flores masculinas foi o que mais contribuiu para a divergência entre os acessos, com os demais sendo responsáveis por 0,76 %. As distâncias Euclidianas médias entre os pares de acessos variaram de 0,47 a 3,4 com média de 1,31. Os acessos 16 e 20 se mostraram menos divergentes, enquanto os acessos 11 e 27 os mais distantes. Os 29 acessos formaram seis e dois grupos divergentes pelos métodos de Tocher e UPGMA, respectivamente. Assim sendo, pelo menos seis acessos divergentes podem ser indicados para programas de melhoramento genética dessa palmeira

Integrated mango production in Brazil to enhancing production systems, quality, and safety of fruit.

The development and implementation of ecosystem-based technologies in plant protection have been important objectives of the International Organization for Biological Control (IOBC). Integrated Production/lntegrated Farming is a system that produces high quality and safe food and other products by using natural resources and regulating mechanisms to replace polluting inputs and to secure sustainable farming. The objectives and principles of Integrated Production (IP) are based in a holistic view of the system, combining strategies such as Integrated Pest Management (IPM), safety, fertilization, and agronomic measures to enhance their effectiveness

Maconellicoccus hirsutus (Green, 1908) (Hemiptera: Pseudococcidae): exotic pest introduced on vine in the São Francisco Valley.

The pink hibiscus mealybug, Maconellicoccus hirsutusis a polyphagous pest that attacks more than 200 generous and about more than 74 botanical families of cultivated or uncultivated plants. Many of these plants are of economic importance to Brazil, including cotton, cocoa, coffee, coconut, citrus, cucumber, corn, beans, papaya, sweet potatoes, figs, grapes, guavas, peanuts, roses, hibiscusand ornamental palms. However, M. hirsutus was recently introduced in Brazil. This study reported the first time occurence this pest in São Francisco Valley, Northeastern Brazil. After the pest presence alert, samplings were taken inside and around of the plantation of vines. The mealybugs were found attacking all structures of grape plants (Vitis vinifera), native plants of caatinga, weeds, "windbreaks" and fruit trees. In grape plants, the mealybugs inside bunches caused the reduction of the fruits quality and the discard of them, and on the sprouts they cause the inhibition of branches development, compromising at least two harvests. Thus, by severity of the damage, M. hirsutus may be considered one of the most important pests of the grape culture in theregion. The control of this new pest is a big challenge that will require a set of actions including chemical insecticides registration, the development of an effective monitoring plan as well as the search and use of natural enemies adapted to the region

Plantas daninhas associadas às cochonilhas-farinhentas (Hemiptera: Pseudococcidae) em áreas de videira no semiárido brasileiro.

O objetivo deste trabalho foi identificar as espécies de plantas daninhas associadas às cochonilhas-farinhentas em plantios de videira

Vine pest in Northeast of Brazil: a challenge for the production?

The vines producing areas in the São Francisco Valley, located in northeastern Brazil, is the second national pole of the grape production of wines and juices and the main producer of table grapes for in natura consumption. With the increase of cultivated areas in the region, it is the expansion of the geographical distribution of insect pests by dispersing and/or involuntary transport of infested materials, serious problems of the phytosanitary order occur frequently. Thus, this factor is considered a major obstacle to the development of culture in this region affecting productivity and product quality. The insect pests can occur throughout the year attacking various parts of culture, especially in bunches. In Brazil, listed about 40 species of arthropods attacking the growing of vines. However, depending on the region, few species cause significant damage to production (Oliveira et al., 2010). Among the pests that attack the vine in the São Francisco Valley, stands the two mites species Polyphagotarsonemus latus (Banks, 1904) (Acari: Tarsonemidae) and Tetranychus urticae (Koch, 1836) (Acari : Tetranychidae); three thrips species Retithrips syriacus (Mayet, 1890), Selenothrips rubrocinctus (Giard, 1901) and Frankliniella sp. (Thysanoptera: Thripidae); any species of lepidopterous Cryptoblabes gnidiella (Millière, 1864) (Lepidoptera: Pyralidae), Spodoptera frugiperda (Smith, 1797), Spodoptera eridania (Stoll, 1782), Spodoptera cosmioides (Walker, 1858), (Lepidoptera: Noctuidae), Helicoverpa armigera (Hübner, 1805) (Lepidoptera: Noctuidae); cochineal Eurhizococcus brasiliensis (Hempel, 1922) (Hemiptera: Margarodidae) and mealybugs Planococcus citri (Risso, 1813), Dysmicoccus brevipes (Cockerell, 1893) e Phenacoccus solenopsis Tinsley, 1898 (Hemiptera: Pseudococcidae). Recently, it was found the presence of pink hibiscus mealybug, Maconelicoccus hirsutus (Green, 1908) (Hemiptera: Pseudococcidae), becoming a factor to be studied due to the damage that can lead to the growing of vines, as reported in other countries (Vitullo, 2009). Based on the above, is necessary knowledge of the dynamics, habits, damage and time of occurrence of each species, they are fundamental importance for effective control measures to used safely and rationally

Stellar parameters for stars of the CoRoT exoplanet field

Aims:To support the computation and evolutionary interpretation of periods associated with the rotational modulation, oscillations, and variability of stars located in the CoRoT fields, we are conducting a spectroscopic survey for stars located in the fields already observed by the satellite. These observations allow us to compute physical and chemical parameters for our stellar sample. Method: Using spectroscopic observations obtained with UVES/VLT and Hydra/Blanco, and based on standard analysis techniques, we computed physical and chemical parameters ($T_{\rm{eff}}$, $\log \,(g)$, $\rm{[Fe/H]}$, $v_{\rm{mic}}$, $v_{\rm{rad}}$, $v \sin \,(i)$, and $A(\rm{Li})$) for a large sample of CoRoT targets. Results: We provide physical and chemical parameters for a sample comprised of 138 CoRoT targets. Our analysis shows the stars in our sample are located in different evolutionary stages, ranging from the main sequence to the red giant branch, and range in spectral type from F to K. The physical and chemical properties for the stellar sample are in agreement with typical values reported for FGK stars. However, we report three stars presenting abnormal lithium behavior in the CoRoT fields. These parameters allow us to properly characterize the intrinsic properties of the stars in these fields. Our results reveal important differences in the distributions of metallicity, $T_{\rm eff}$, and evolutionary status for stars belonging to different CoRoT fields, in agreement with results obtained independently from ground-based photometric surveys. Conclusions: Our spectroscopic catalog, by providing much-needed spectroscopic information for a large sample of CoRoT targets, will be of key importance for the successful accomplishment of several different programs related to the CoRoT mission, thus it will help further boost the scientific return associated with this space mission.Comment: 43 pages, 17 figures, accepted for publication in A&

O cultivo da macieira no Semiárido brasileiro: a ocorrência de pragas é problema?

Objetivou-se com este trabalho identificar e conhecer a dinâmica populacional de espécies de artrópodes fitófagos em macieira na região Semiárida de Pernambuco