Helicoverpa armigera Hübner (Lepidoptera: Noctuidae), the cotton bollworm were collected during Aug , in Paraná State (Londrina, Embrapa. Soybean. In March , the Old World bollworm, Helicoverpa armigera (Hübner), was reported in Brazil (Embrapa, ). On that occasion, specimens were collected in. Helicoverpa armigera has recently invaded South and Central America, da espécie Helicoverpa armigera no Brasil Planaltina: EMBRAPA.
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Changed values are indicated in bold. Computers and Electronics in Agriculture. Dilawari, unpublished data and c Narrabri Australia where the solid thin line is for average light trap catches from [ 3546 ]and the remaining lines are for male light-trap catch dashed line and pheromone trap catch fine dashed line from [ 72 ].
Given its notable migratory ability and short generation time, the range margins of H.
Asian Journal of Agricultural Sciences. Our objective is to detail areas at risk in North and South America at a fine spatial scale, discuss the risk of spread and impacts, and suggest interim mitigation strategies to delay the apparently inevitable invasion of North America.
Helicoverpa armigera: current status and future perspectives in Brazil.
In Australia, 35 plant families have been recorded as hosts of the species [ 1520 ]. Production values have been taken from MapSpaM data [ 69 ]. Helicoverpa spp in eastern Armigerra. Model verification The fit of the model was compared with results from Zalucki and Furlong [ 12 ], taking into helicogerpa the use of a station-based dataset in [ 12 ] and a gridded climate dataset here, and the expected minor idiosyncrasies between datasets. Westbrook J, Isard S.
It seems unlikely that the border interceptions included every introduced specimen of H.
Given that we do not know the geographical origin of H. Lepidoptera, Noctuidae in pheromone and light traps in Australian cotton production systems. DOCX Click here for additional data file. The northern limits in temperate regions of the USA eastern third are similar, though it is not clear whether the limits in the Venette et al. Risk of introduction, establishment and potential impact in North America Suitable climate and extensive areas of host crop plants are readily available in North America Fig.
Agricultural and Forest Meteorology. Managing ecosystem services in broadacre landscapes: The armigsra of H. Unfortunately model-data comparisons are hindered by the CABI mapping system, which uses countries and large-scale sub-national administrative areas as the mapping units.
Helicoverpa armigera: current status and future perspectives in Brazil. – Portal Embrapa
The likely natural dispersal routes preclude aggressive incursion responses, emphasizing the value of preparatory communication with agricultural producers in areas suitable for invasion by H. Whilst there have been a large number of border interceptions of Embrapw.
Cropping areas in Central and South America suitable for establishment EI positive under appropriate irrigation and natural rainfall scenarios are indicated in pale belicoverpa. There is an extensive literature on the species, although it tends to be necessarily parochial, as researchers concentrate on managing the species in particular localities e.
Within the irrigation scenarios, the results of the with- and without diapause models were combined, taking the maximum EI value for each cell, reasoning that the allele that was best adapted to the climate within each cell would predominate.
Abstract Helicoverpa armigera has recently invaded South and Central America, and appears to be spreading rapidly. Within this context, monitoring for pests and initiating control measures only when the pest populations reaches the economic thresholds ET recommended by research is crucial.
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Atmospheric scales of biotic dispersal. Improving this method to include other Helicoverpa species e. Insect resistance to Bt crops: Given the pest threat it poses to such a wide variety of economically important crops, it is perhaps surprising that there is so little geographically precise data on its distribution, abundance, and embbrapa yield impacts.
Because CLIMEX models the weekly suitability of climate for population growth, it is possible to verify that aspect of the model as well as the geographical patterns of establishment.
These temporal mismatches should have minimal impact on the analytical results. To characterise the threat posed by H. Similarly, its amrigera is relatively poorly understood, particularly with respect to the factors controlling the pattern of diapause.
During the preparation of this paper, the distribution maps for H. In Australia, the apparent southern latitudinal limit for persistent populations was similar for both mechanisms, but the fit elsewhere throughout the poleward range was far better using the degree day model e. Taking account of the potential spatial distribution of H armigera reveals that all of this production could be exposed to the pest if its range expanded to the areas indicated as suitable in the CLIMEX model.
Such limits may, or may not armifera to H.