Distribution of Sunn Pest, Eurygaster integriceps Puton (Hemiptera: Scutelleridae), in overwintering sites

Parker, Bruce L.; Amir-Maafi, Masood; Skinner, Margaret; Bouhssini, Mustapha El

doi:10.1016/j.aspen.2010.10.005

Cited by 18 publications

(12 citation statements)

References 10 publications

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“…Moreover, in this species, diapause is induced in advance of the advent of harsh environmental conditions. The overwintering adult migrates back to the cereal fields in the following spring (March-April) (Iranipour et al, 2010;Parker et al, 2011;Davari and Parker, 2018) (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Overwintering Physiology and Cold Tolerance of the Sunn Pest, Eurygaster integriceps, an Emphasis on the Role of Cryoprotectants

2020

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As a serious pest of wheat, the Sunn pest, Eurygaster integriceps Puton (Hem.: Scutelleridae), is prevalent in Iran. This pest belongs to univoltine species and tends to estivate and overwinter in high altitudes of nearby mountains as diapausing adults. The economic importance of the crop was attacked by this pest, i.e., wheat led the authors to study the physiological adaptations of these diapausing adults, that is, changes in the supercooling point (SCP), in the accumulation of cryoprotectants, and in the activities of the related enzymes in relation to diapause development. The mean SCP of the diapausing adults was found to be −8 • C. The lowest SCP, i.e., approximately −11 • C, was observed in the middle of diapause, October, when the highest cold hardiness was also interestingly recorded. This finding proposed that SCP depression could be a feasible cold-tolerance strategy for diapausing adults. The sugar content was high in the initiation and at the termination of diapause and was low during diapause maintenance. These sugar reserves were most likely utilized to be converted to glycogen and lipid during diapause maintenance as a survival strategy. The changes in the glycogen and lipid contents were inversely proportional to the changes in the total sugar content. The authors also found that the changes in the glycogen content were directly proportional to those in the low-molecular-weight carbohydrates (e.g., glycerol and trehalose) and in the diapause development. This finding underlined the role of the low-molecularweight carbohydrates, such as the cryoprotectants, in enhancing the cold tolerance of the given insect. In this study, the diapause-associated changes in the activities of α-amylases and proteases were also investigated. The results showed that the enzyme activities were related to diapause development and cold-tolerance enhancement. The highest enzyme activity was observed in September. Since the overwintering adults of the Sunn pest could not tolerate temperatures below their SCPs, they were grouped in the freeze-intolerant species.

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Section: Introductionmentioning

confidence: 99%

Overwintering Physiology and Cold Tolerance of the Sunn Pest, Eurygaster integriceps, an Emphasis on the Role of Cryoprotectants

2020

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“…These bugs are not less harmful in Russia, espe cially in the North Caucasus, Lower and Middle Volga region, and adjacent regions (Kamenchenko et al, 2010). These bugs have one generation per year with a mandatory diapause in adulthood, are rather thermo philic, with the highest activity extended at 25-30°C and above (Iranipour et al, 2010;Mehrabadi et al, 2010); they can migrate for miles (Grivanov, Zakharov, 1958) and climb into the mountains to an altitude of 1800-2000 m (Parker et al, 2011). Climate warming promotes the expansion of the range of their distribu tion and severity.…”

Section: Introductionmentioning

confidence: 98%

Wheat breeding for resistance to the Sunn pest (Eurygaster spp.): Does risk occur?

Krupnov

2012

Russ J Genet Appl Res

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Wheat is among the most valuable daily foodstuff items. However, it induces allergies or celiac dis ease in approximately 1 out of 100 persons, most often in children. In many regions, harmful Sunn bugs con siderably reduce crop yield and grain quality. Climate warming provides favorable conditions for the expan sion of the geographic range of these bugs and "enhances their harmfulness." There are two major approaches to tackling this problem: genetic protection of the plant itself and genetic protection of the seed, i.e., the prog eny. The former approach appears to be less risky to human health. Wheat requires protection against Sunn bugs that impairs neither the gluten rheology nor the nutritional value of the grain. The basic method is the development of an integrated system for controlling bugs that would include, in addition to technological, biological, and chemical methods, genetic protection. Taken together, these components allow the cultiva tion of environmentally safe wheat. It is also relevant to develop wheat cultivars with reduced contents of allergy and celiac disease determinants.

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“…Sunn pests attack the leaves, stems, and grains of wheat for feeding, and while doing this they inject their digestive enzymes into the wheat kernel. The insect‐damaged wheat contains residual salivary secretion of insects, including proteolytic enzyme(s) . The protease breaks down the gluten structure, resulting in poor dough and bread properties …”

Section: Introductionmentioning

confidence: 99%

“…The insect-damaged wheat contains residual salivary secretion of insects, including proteolytic enzyme(s). 3,4 The protease breaks down the gluten structure, resulting in poor dough and bread properties. [5][6][7][8][9] During the early stages of kernel development (e.g., milk-ripe stage), much of the kernel content may be sucked out by the insect, resulting in lighter and shriveled kernels that are easily removed in the cleaning section of flour mill.…”

Section: Introductionmentioning

confidence: 99%

Development of a peptide substrate for detection of sunn pest damage in wheat flour

2018

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Distribution of Sunn Pest, Eurygaster integriceps Puton (Hemiptera: Scutelleridae), in overwintering sites

Cited by 18 publications

References 10 publications

Overwintering Physiology and Cold Tolerance of the Sunn Pest, Eurygaster integriceps, an Emphasis on the Role of Cryoprotectants

Overwintering Physiology and Cold Tolerance of the Sunn Pest, Eurygaster integriceps, an Emphasis on the Role of Cryoprotectants

Wheat breeding for resistance to the Sunn pest (Eurygaster spp.): Does risk occur?

Development of a peptide substrate for detection of sunn pest damage in wheat flour

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