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中国梳蓟马属一新种记述(缨翅目:蓟马科) 总被引：1，自引：0，他引：1
本文记述了在湖北神农架山区杂草上采获的梳蓟马属(Cte(?)ips)一新种,滑背梳蓟马Cie(?)hrips leic(?)tus,模式标本保存于华南农业大学昆虫标本室,本新种与产自日本的C.(?)Haga ＆ Okajima的雌虫颇相似,但前者头较短,头长与头宽之比为0.85,而后者为1.02;复眼后面不收缩;长翅型,前翅前缘鬃具29根,上脉鬃23—24根,下脉鬃18—19根,本种又与C.(?)Chen(产自台湾)的雄虫相似,但本种的前胸背板光滑,腹部第LX背板无锥状鬃。 相似文献
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The minute pirate bug Orius insidiosus (Say) is an important predator in mango agroecosystems. It attacks several species of thrips, particularly Frankliniella invasor Sakimura, which is considered a species of economic importance in mango. We investigated the effect of six diets on the development, survival, and reproduction of O. insidiosus: 1) first instars of F. invasor, 2) second instars, 3) adults, 4) pollen, 5) pollen plus thrips larvae, and 6) water. Individuals fed on thrips larvae, with or without pollen, completed their immature development significantly faster. Nymphs of O. insidiosus were able to complete their development feeding on pollen only, while individuals that received water as a diet were unable to reach the adult stage. The highest intrinsic growth rate was obtained when O. insidiosus were fed on pollen plus thrips larvae, and the lowest when individuals were fed on thrips adults. Our studies show that a diet of pollen plus F. invasor larvae is optimal for O. insidiosus development and population growth. 相似文献
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Use of host plant resistance is an essential component of integrated management of Thrips tabaci Lindeman. The present research was designed to screen five commercial cultivars of potato, namely Agria, Kondor, Morene, Diamant and Savalan, and two breeding lines 397082-2 and Khavaran for their susceptibility to thrips infestation and for their mean relative plant growth rate (MRGR) and crop yield in an experimental field (not frected with insecticides) and a control field (chlorpyrifos frected) in the Ardabil region of Iran in 2011 and 2012. Thrips populations were assessed by visual inspection on potato leaves. At harvest time, the percentage of leaf area damaged by thrips infestation was assessed on leaves of the tested genotypes. All adults of phytophagous thrips collected in the experimental field were T. tabaci. In both years the mean numbers of thrips adults and larvae were lowest on Savalan cultivar among the tested genotypes. The mean damage index was also lowest on Savalan in both years and the MRGR and the mean yield were greatest in Savalan in the control field. Moreover, in thrips-infested plants, the lowest percentage of MRGR loss and the lowest percentage of yield reduction were observed in Savalan (3.7% and 5.8%, respectively). Of the genotypes tested, Savalan is the most resistant host and has potential for use in the sustainable management of T. tabaci on potato. 相似文献
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A survey was conducted in order to record the ornamental plants that are hosts of tomato spotted wilt virus (TSWV) and impatiens
necrotic spot virus (INSV) in Greece. Polyclonal antibodies prepared against the N protein of a Greek isolate of TSWV fromGerbera jamesonii (GR-34) were used. Leaf samples were taken from plants showing typical symptoms of tospovirus infection such as chlorotic
and necrotic rings on the leaves and malformation and necrosis of the flowers. The samples were tested by double antibody
sandwich enzyme-linked immunosorbent assay (DAS-ELISA) using polyclonal antibodies to the N proteins of TSWV and INSV (NL-07).
ELIS A-positive samples were mechanically transmitted to plants ofPetunia hybrida, Nicotiana rustica andN. benthamiana to confirm infection. Although none of the samples was found infected with INSV, TSWV presence was recorded in 42 botanical
species that belong to 40 genera in 27 families. Among them the speciesBeloperone guttata, Coleus barbatus, Impatiens petersiana andLilium auratum are reported for the first time as hosts of TSWV, whereasBegonia sp.,Catharanthus roseus Celosia cristata, Dianthus chinensis, Fuchsia hybrida andStephanotis floribunda are found as new hosts of the virus in Greece. Thrips collected from TSWV-infected plants were in most cases identified asFrankliniella occidentalis, except from plants ofDendranthema sp. andDianthus caryophyllus whereThrips tabaci individuals were also identified. Different percentages of transmitters were noticed when the thrips populations collected
from TSWV-infected ornamental hosts were tested for transmission of TSWV. 相似文献
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Our research assessed how the number of sprayings with deltamethrin influenced the efficiency against onion thrips, Thrips tabaci, on early white cabbage. The study was performed in 2002 and 2005 using the early white cabbage cultivar Parel, which is
very susceptible to the attack of onion thrips. The cabbages were planted in a block-design experiment, with percentage of
damage on the exterior leaves recorded according to the positions of the leaves (i.e. outer to inner). Although the attack
of thrips was much greater in 2002 than in 2005, nevertheless, control plants in both years showed much more damage than plants
with at least one insecticide spraying. In 2002, there was little difference between one and two sprayings, but three sprayings
showed a significantly improved result. However, three sprayings of this insecticide is generally not permitted in farming
practice. In 2005, no differences in efficacy among one, two and three sprayings were recorded. We also assessed a high threshold
(up to 10% damaged leaf surface) and low threshold (up to 1% damaged leaf surface) for the removal of damaged leaves. In 2002,
both thresholds were exceeded for control plants, but in 2005, the attack of thrips was mild enough that neither threshold
was exceeded. In this case, one spraying was sufficient to reduce leaf damage below the higher (more tolerant) threshold,
but three sprayings were needed to reduce leaf damage below the lower (more stringent) threshold. Therefore, in Slovenia or
other parts of the world with similar climatic conditions, we recommend one spraying as broadly effective and recommend the
more tolerant threshold for leaf removal. 相似文献
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