scholarly journals Consumption and use of soybean by the caterpillar Helicoverpa armigera

2018 ◽  
Vol 48 (12) ◽  
Author(s):  
Crislaine Sartori Suzana ◽  
Cálvin Felipe Rosa ◽  
Fabriele da Luz Alves ◽  
José Roberto Salvadori
Keyword(s):  
Helicoverpa Armigera ◽  
Production Systems ◽  
Nutritional Ecology ◽  
Reproductive Organs ◽  
Grain Development ◽  
Damage Potential ◽  
Helicoverpa Armígera ◽  
Feeding Regimes ◽  
Soybean Plants ◽  
Insight Into

ABSTRACT: A deep insight into the population dynamics of a pest can be achieved by being acquainted with its nutritional ecology, which further assists in understanding the damage potential and decisions to control mainly in diversified production systems such as those in Brazil. The present r research aimed to evaluate the effect of dietary regimens, comprising combinations of acessible organs of soybean plants, at different stages of development, consumption, and utilization of food by the 4th, 5th, and 6thlarvae instar of Helicoverpa armigera (Hübner) (Lep.: Noctuidae). For this purpose, the vegetative and reproductive organs of soybean were brought together in three feeding regimes, followed by making it available to caterpillars. After evaluations, it was found that under laboratory conditions, the development of H. armigera 4th to 6th instar caterpillars was better when they werepurely fed on leaves than on combinations of vegetative and reproductive parts, such as fresh leaves + old leaves + pods at the beginning of grain development, and old leaves + pods at the beginning of grain development +pods with well-developed grain.

Mating of Helicoverpa armigera (Lepidoptera: Noctuidae) moths and their host plant origins as larvae within Australian cotton farming systems

2012 ◽  
Vol 103 (2) ◽  
pp. 171-181 ◽  
Author(s):  
G.H. Baker ◽  
C.R. Tann
Keyword(s):  
Host Plant ◽  
Helicoverpa Armigera ◽  
Stable Carbon Isotopes ◽  
Production Systems ◽  
Farming Systems ◽  
C4 Plants ◽  
C3 Plants ◽  
Bt Cotton ◽  
Cotton Production ◽  
Helicoverpa Armígera

AbstractTransgenic (Bt) cotton dominates Australian cotton production systems. It is grown to control feeding damage by lepidopteran pests such as Helicoverpa armigera. The possibility that these moths might become resistant to Bt remains a threat. Consequently, refuge crops (with no Bt) must be grown with Bt cotton to produce large numbers of Bt-susceptible moths to reduce the risk of resistance developing. A key assumption of the refuge strategy, that moths from different host plant origins mate at random, remains untested. During the period of the study reported here, refuge crops included pigeon pea, conventional cotton (C3 plants), sorghum or maize (C4 plants). To identify the relative contributions made by these (and perhaps other) C3 and C4 plants to populations of H. armigera in cotton landscapes, we measured stable carbon isotopes (δ13C) within individual moths captured in the field. Overall, 53% of the moths were of C4 origin. In addition, we demonstrated, by comparing the stable isotope signatures of mating pairs of moths, that mating is indeed random amongst moths of different plant origins (i.e. C3 and C4). Stable nitrogen isotope signatures (δ15N) were recorded to further discriminate amongst host plant origins (e.g. legumes from non-legumes), but such measurements proved generally unsuitable. Since 2010, maize and sorghum are no longer used as dedicated refuges in Australia. However, these plants remain very common crops in cotton production regions, so their roles as ‘unstructured’ refuges seem likely to be significant.

Organisms with potential to assist in the control of Helicoverpa armigera in Australian cotton production systems

2016 ◽  
Vol 67 (12) ◽  
pp. 1288
Author(s):  
Oliver G. G. Knox ◽  
Chris M. T. Anderson ◽  
Jenna L. Ross ◽  
Colin C. R. Tann ◽  
Vadakattu V. S. R. Gupta
Keyword(s):  
Helicoverpa Armigera ◽  
Production Systems ◽  
Genetically Modified ◽  
Insect Pest ◽  
Natural Populations ◽  
Cotton Production ◽  
Abnormal Growth ◽  
Genetically Modified Cotton ◽  
Development Of Resistance ◽  
Helicoverpa Armígera

Helicoverpa armigera was once considered the most important insect pest to Australian cotton production. The introduction of genetically modified cotton altered this status and made this insect pest control less chemically dependent, but resistance to the insecticidal compounds expressed in genetically modified cotton has evolved in laboratory-reared H. armigera populations and is shown to exist in natural populations. Preventing the development of resistance in field populations is complicated by the over wintering of potentially resistant individuals in the soil. Biocontrol may assist in reducing the population of resistant individuals. Several projects investigating the ecology of Australian cotton highlighted the existence of several native organisms with ability to limit the growth or utilise H. armigera as a host. The work reported here set about establishing the presence of such organisms in Australian cotton soils by recovering them from soil and farm-collected H. armigera that exhibited abnormal growth, disease or death. The recovered organisms were identified as the fungi Lecanicillium lecanii, Actinomucor elegans and several Aspergillus species. L. lecanii was subsequently shown to reduce moth emergence to 56% of the larvae to which it was applied. We also identified a species of Rhabditis nematode, which killed 34% of the larvae to which it was applied and reduced moth emergence to 28%. In light of these observations these organisms are reported as potential candidates for biological control of H. armigera.

Floral Visitation Can Enhance Fitness of Helicoverpa armigera (Lepidoptera: Noctuidae) Long-Distance Migrants

2019 ◽  
Vol 112 (6) ◽  
pp. 2655-2662
Author(s):  
Yan Zhou ◽  
Shengyuan Zhao ◽  
Menglun Wang ◽  
Wenhua Yu ◽  
Kris A G Wyckhuys ◽  
...  
Keyword(s):  
Life History ◽  
Helicoverpa Armigera ◽  
Host Plants ◽  
Nutritional Ecology ◽  
Pollen Grain ◽  
Long Distance ◽  
Evening Primrose ◽  
History Effects ◽  
Adult Feeding ◽  
Helicoverpa Armígera

Abstract Numerous insect species engage in seasonal, trans-latitudinal migration, in response to varying resource availability, climatic conditions and associated opportunities, to maximize fitness and reproductive success. For certain species, the interaction between migrant adults and individual host plants is well-studied under laboratory conditions, but scant knowledge exists on the nutritional ecology of wild (i.e., field-caught) moths. During 2017–2018, we trapped adults of the cotton bollworm Helicoverpa armigera (Hübner) along its migration pathway in northeastern China and used pollen grain analysis to assess its visitation of particular host plants. Next, we assessed life history effects of adult feeding on carbohydrate-rich resources, for migrant individuals. Pollen grain analysis revealed H. armigera visitation of 32 species from 28 families, with the largest carrier ratio for northward migrants. Evening primrose (Oenothera spp.) accounted for 48% of pollen grains, indicating a marked H. armigera feeding preference. Furthermore, feeding on sugar-rich foods benefited adult fitness, enhanced fecundity by 65–82% and increased flight distance by 38–55% as compared to unfed individuals. Also, the degree of enhancement of reproduction and flight performance following sugar feeding varied between different migratory cohorts. Our work combines (polymerase chain reaction [PCR]-assisted) palynology and laboratory-based life history trials to generate novel perspectives on the nutritional ecology of long-distance migratory insects. These findings can aid the development of population monitoring and ‘area-wide’ management strategies for a globally-important agricultural pest.

scholarly journals Determination of economic injury levels of Helicoverpa armigera (Hubner) in chickpea

1970 ◽  
Vol 33 (4) ◽  
pp. 555-563 ◽  
Author(s):  
MA Zahid ◽  
MM Islam ◽  
MH Reza ◽  
MHZ Prodhan ◽  
M Rumana Begum
Keyword(s):  
Helicoverpa Armigera ◽  
Threshold Level ◽  
Damage Potential ◽  
Cropping Season ◽  
Pod Borer ◽  
Economic Injury ◽  
Helicoverpa Armígera ◽  
The Cost ◽  
Single Larva

Chickpea pod borer Helicoverpa armigera (Hubner) is considered to be one of the major pests of chickpea. The damage potential and economic threshold level for Helicoverpa armigera larvae on chickpea crop were worked out. On an average, single larva per m row reduced the yield to the extent of 155 kg/ha and 157 kg/ha in 2004-05 and 2005-06 cropping season, respectively. The ratio of the value of yield saved to the cost of insecticide application at one larva per m row was 1.06 and 1.12 in 2004-05 and 2005-06, respectively. EILs for Helicoverpa armigera were determined as 12 and 0.95 per m row and ETLs was at 09 and 0 73 larvae per m row in 2004-05 and 2005 - 06, respectively. Key Words: Economic injury, chickpea, pod borer doi: 10.3329/bjar.v33i4.2288 Bangladesh J. Agril. Res. 33(4) : 555-563, December 2008

scholarly journals Toxicity of Andira paniculata (Fabaceae) Extracts to Helicoverpa armigera (Lepidoptera: Noctuidae)

2018 ◽  
Vol 10 (6) ◽  
pp. 264
Author(s):  
Maurilio de Sousa Neto ◽  
Franciele Cristina da Silva ◽  
André Cirilo De Sousa Almeida ◽  
Antônio Carlos Severo Menezes ◽  
Márcio Da Silva Araujo ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Helicoverpa Armigera ◽  
Larval Stage ◽  
Dry Matter ◽  
Larval Period ◽  
Pupal Weight ◽  
Biological Parameters ◽  
Helicoverpa Armígera ◽  
Soybean Plants ◽  
Lepidoptera Noctuidae

Helicoverpa armigera is one of the most important pests of soybean crop in Brazil. The purpose of this work was to evaluate the effect of organic Andira paniculata extracts on its biology, feeding and the attractiveness of soybean plants to H. armigera. Hexane, dichloromethane, ethyl acetate and hydroalcoholic fractions at concentrations of 0.01, 0.1, 0.5 and 1% were evaluated. For the biological parameters the period and viability of larval stage, caterpillar weight at ten days, period, viability and pupal weight at 24 hours, total longevity, LC50 and deterrence were evaluated. The non-preference for feeding and attractiveness, the number of caterpillars and the dry matter consumed in each fraction of the extracts were evaluated. The extract of A. paniculata in hexane (0.01%) resulted up to 85% mortality of H. armigera. The A. paniculata extract did not affect the larval period, weight, pupal period and mortality or the consumption of H. armigera. The hydroalcoholic extracts obtained the better results for deterrence. The A. paniculata extract in dichloromethane fraction had the lowest LC50. The A. paniculata extracts in the hexane fractions (0.1%), ethyl acetate (0.01 and 0.5%) and hydroalcoholic (0.01 and 0.5%) were fagodeterrents for H. armigera. Thus, A. paniculata extract in hexane fraction is the most promising for use in the control of H. armigera in soybean.

Hybridization between Helicoverpa armigera and Helicoverpa assulta (Lepidoptera: Noctuidae): development and morphological characterization of F1 hybrids

2005 ◽  
Vol 95 (5) ◽  
pp. 409-416 ◽  
Author(s):  
X.-C. Zhao ◽  
J.-F. Dong ◽  
Q.-B. Tang ◽  
Y.-H. Yan ◽  
I. Gelbic ◽  
...  
Keyword(s):  
Helicoverpa Armigera ◽  
Reproductive Organs ◽  
Morphological Characterization ◽  
F1 Hybrids ◽  
Z Chromosome ◽  
Normal Male ◽  
Helicoverpa Assulta ◽  
Helicoverpa Armígera ◽  
The Cross ◽  
Normal Offspring

AbstractReciprocal hybridizations between Helicoverpa armigera (Hübner) and Helicoverpa assulta (Guenée) were studied. The cross between females of H. armigera and males of H. assulta yielded only fertile males and sterile individuals lacking an aedeagus, valva or ostium bursae. A total of 492 larvae of the F1 generation were obtained and 374 of these completed larval development and pupated. Only 203 pupae were morphologically normal males, the remaining 171 pupae were malformed. Larvae and pupae that gave rise to morphologically abnormal adults exhibited longer development times. Sterility was not only associated with malformed external sex organs, but also a range of abnormalities of the internal reproductive system: (i) loss of internal reproductive organs, (ii) with one to three copies of an undeveloped bursa copulatrix; or (iii) with one or two undeveloped testes. Normal male hybrid adults showed higher flight activity in comparison with males of both species. In contrast, the cross between females of H. assulta and males of H. armigera yielded morphologically normal offspring (80 males and 83 females). The interaction of the Z-chromosome from H. assulta with autosomes from H. armigera might result in morphological abnormalities found in hybrids and backcrosses, and maternal-zygotic incompatibilities might contribute to sex bias attributed to hybrid inviability.

scholarly journals Potential of Predator Podisus nigrispinus Dallas (Hemiptera: Pentatomidae) in the Control of Helicoverpa armigera Hübner (Lepidoptera: Noctuidae)

2020 ◽  
Vol 12 (3) ◽  
pp. 204
Author(s):  
Juliana Simonato ◽  
Harley N. de Oliveira ◽  
José F. J. Grigolli ◽  
Mirian M. Kubota Grigolli ◽  
Ivana F. da Silva
Keyword(s):  
Helicoverpa Armigera ◽  
Integrated Management ◽  
Predation Rate ◽  
Instar Nymph ◽  
Limited Information ◽  
Adult Females ◽  
Helicoverpa Armígera ◽  
Soybean Plants ◽  
Previous Phase ◽  
Lepidoptera Noctuidae

Managing Helicoverpa armigera is still a major challenge for Brazilian farmers, due to limited information available about chemicals and biological control of this pest in Brazil. This study focused on evaluating the biological aspects of Podisus nigrispinus fed with H. armigera, under laboratory conditions, as well as verifying the capacity of the P. nigrispinus in preying on caterpillars of H. armigera in the field, in soybean crops. The experiments were conducted in laboratory under controlled temperature conditions of 25±2 ºC, relative humidity (RH) 60±10% and 14-hour photophase, as well as in the field, at the experimental station of Fundação MS in Maracaju, MS. In the laboratory, second instar nymphs of P. nigrispinus were placed in plastic jars and fed with H. armigera larvae or Tenebrio molitor larvae throughout the nymphal phase. When they reach adulthood, 15 couples were formed, remaining with the same prey of the previous phase. For the field trial, soybean plants were caged, and inside these cages were released eight quarter-instar H. armigera caterpillars. Subsequently, in each cage were released an adult female or a fifth instar nymph, and after 24 hours, the number of prey caterpillars were assessed. Predator nymphal duration was shorter in treatment with H. armigera than with T. molitor. Nymphal viability was similar between treatments. Adult females and males fed with H. armigera presented greater body mass than those fed with T. molitor. The number of postures per female and the number of eggs per female were similar between treatments. The incubation period of eggs was longer for treatment with H. armigera, differing statistically from treatment with T. molitor. Eggs from treatment with H. armigera showed similar viability to treatment with T. molitor, not differing statistically. Females and males under treatment with H. armigera showed longer longevity compared to treatment with T. molitor. Adult females preyed on average 2.26 caterpillars within 24 hours and fifth instar nymphs preyed on 1.73 caterpillars/day. P. nigrispinus showed better development when fed with H. armigera, demonstrating that it can be used as an alternative host for breeding this predator. The predator showed satisfactory performance for predation rate/day. Release of fifth instar nymphs and adult females of P. nigrispinus may reduce the pest population in relation to the absence of the predator under field conditions, an important alternative to be used in H. armigera integrated management programs.

scholarly journals Oviposition behavior of Helicoverpa armigera in soybean

2020 ◽  
Vol 87 ◽  
Author(s):  
Renato Franco Oliveira de Moraes ◽  
Arlindo Leal Boiça Júnior ◽  
Wellington Ivo Eduardo ◽  
Zulene Antônio Ribeiro
Keyword(s):  
Helicoverpa Armigera ◽  
Oviposition Behavior ◽  
Oviposition Preference ◽  
Growth Stages ◽  
Soybean Plant ◽  
Trifoliate Leaf ◽  
Pair Density ◽  
Helicoverpa Armígera ◽  
Soybean Genotypes ◽  
Soybean Plants

ABSTRACT The objective of this study was to evaluate the oviposition behavior of Helicoverpa armigera confined in different adult pair density and growth stages of soybean plants, and the resistance of soybean genotypes to H. armigera in the category nonpreference for oviposition. The oviposition behavior of H. armigera was assessed using one, two, and four adult pairs per soybean plant of the cultivar BR-16 at the growth stages: vegetative V8 (eighth unrolled trifoliate leaf), reproductive R2 (full bloom) and reproductive R5.2 (beginning seed). The nonpreference for oviposition was evaluated using eight soybean genotypes and an oviposition preference index was calculated. The number of trichomes in leaflets was quantified for being correlated to H. armigera oviposition. One adult pair and soybean plants stage at pod-set affected and showed the best results oviposition preference on soybean plants. The genotypes M8230-RR and W711-RR presented resistance characteristics, and PI-227687 was preferred for oviposition. The trichome density positively affects the female oviposition behavior.

Sign in / Sign up

Export Citation Format

Share Document