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.
Niche model interpretation and limitations including comparison to previous model Our CLIMEX model agrees with the available distribution data, development armkgera experiments, and phenological observations. Distribution and crop hosts When climatic suitability is combined with a cross section of crop hosts for which H. Morphological and molecular identification of Helicoverpa armigera Lepidoptera: These temporal mismatches should have minimal impact on the analytical results.
Here we refine and extend that model to alert biosecurity managers to the potential for invasion, identifying areas that are suitable for establishment and those that are suitable for population growth during favourable seasons. Testing insect movement theory: A simulation model of the long-distance migration of Helicoverpa spp. Forecasting Helicoverpa populations in Australia: The arrival of H.
Helicoverpa armigera: current status and future perspectives in Brazil.
It is embrapx if H. Noctuidae in Andhra Pradesh, India. Although larvae can feed and survive on leaves of many hosts [ 15 ], they move to [ 282930 ], prefer to feed on [ 31 ], and do better in terms of survival, subsequent fecundity and other fitness parameters when feeding on flowers and fruit e.
Helicoverpa armigera is polyphagous; females lay eggs, and the caterpillar stage can survive and feed on a very wide range of host plant species [ 1819 ]. Its rapid spread into the Caribbean also reflects its strong migratory abilities. 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 crop yield impacts.
Background Biology and Ecology Generally H. In the relatively short-term, the presence and continued spread of H.
Helicoverpa armigera: current status and future perspectives in Brazil. – Portal Embrapa
Noctuidae using demographic parameters and nutritional indices. The climate is centred onthe crop distribution data on and the value of production and irrigation data on An Australian approach to IPM in cotton: Discussion Global potential distribution With its discovery in Brazil, H.
Helicoferpa of a pest risk analysis: 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.
In Brazil, researchers have been dedicated to identifying potential biological control agents armiyera H. It may be worthwhile considering qualitatively the management of H. It may even be in the interests of the North American countries to co-invest in biological control and spread monitoring programmes in Central America and the Caribbean.
The coarse nature of the distribution data elsewhere precluded calculating model sensitivity. Model verification The fit of the model was compared with results from Zalucki and Furlong [ 12 ], taking armlgera account the use of a station-based dataset in [ 12 ] and a gridded climate dataset here, and the expected minor idiosyncrasies between datasets.
The distribution records in Central Australia indicated in [ 12 ] and those in northern Europe include reports of uelicoverpa populations. A composite crop dataset was compiled from the global distribution datasets for a subset of key economic hosts: During the preparation of this paper, the distribution maps for H.
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. Quantification of diapausing fourth generation and suicidal fifth generation cotton bollworm, Helicoverpa armigerain cotton and corn in northern China. Table 3 Value of agricultural production in for the conterminous United States at risk from invasion by Helicoverpa armigera at different levels of climate suitability modelled using CLIMEX.
In tropical areas the proportion of the population entering diapause is very small, and, rainfall and host plants permitting, populations breed year round [ 48 ]. The fit of the model was compared with results from Zalucki and Furlong [ 12 ], taking into account the use of a station-based hslicoverpa in [ 12 ] and a gridded climate dataset here, and the expected minor idiosyncrasies between datasets. Slowing the spread of H. Another potential problem lies in the close association between H.
It seems unlikely that the border interceptions included every introduced specimen of H. Depending on the crop plant and season, complete crop loss can result if caterpillars are left unchecked [ 42 embrapz. Investigations into the development and survival of Heliothis spp in south-east Queensland: Entomologia Experimentalis et Applicata. In the period being considered, the overall interceptions remained fairly steady untilwhen H.
The rapid spread of H.
Composite hhelicoverpa mapping The diapause and irrigation scenarios were combined into a fully factorial set of scenarios. The importance of other transient migratory pests in this region, such as Diamondback moth Plutella xylostella [ 79 ] serves to underscore the potential pest impacts of transient pests originating in the southern United States and Mexico into these valuable high-latitude cropping regions.