The influence of wheat growth stage on yield reductions caused by the rose‐grain aphid, <i>Metopolophium dirhodum</i>

Holt, John; Griffiths, Ellis; Wratten, Stephen D.

doi:10.1111/j.1744-7348.1984.tb02797.x

Cited by 26 publications

(15 citation statements)

References 5 publications

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“…Extensive damage can occur when aphid populations are large throughout the crop; therefore, settling of aphids needs to be reduced from the beginning of crop development 4. This has considerable consequences for yield as well as for the baking quality of flour 5…”

Section: Introductionmentioning

confidence: 99%

Jasmonic acid induces resistance to economically important insect pests in winter wheat

2010

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Section: Introductionmentioning

confidence: 99%

Jasmonic acid induces resistance to economically important insect pests in winter wheat

2010

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“…are the most abundant species in winter wheat (Triticum aestivum (L.)), Rhopalosiphum padi L. occurring in lower densities (Carteret al, 1982). Although both S. avenae and M. dirhodum can cause significant damage (Ankersmit and Carter, 1981;Holt et al, 1984), S. ave1we usually attains higher densities under Dutch conditions. Therefore, attention is focussed on S. avenae in this paper.…”

Section: Introductionmentioning

confidence: 99%

Simulation of damage in winter wheat caused by the grain aphid Sitobion avenae. 1. Quantification of the effects of honeydew on gas exchange of leaves and aphid populations of different size on crop growth

Rossing

Wiel

1990

Netherlands Journal of Plant Pathology

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Damage in winter wheat caused by the grain aphid Sitobion avenae F., was studied in the laboratory and at field level.Honeydew substitute solution was applied to flag leaves of winter wheat plants. One and fifteen days after application, the rates of net carbon dioxide assimilation and transpiration were measured. The rate of dark respiration was significantly higher one day after application of honeydew substitute as compared to the control. Other parameters describing the carbon dioxide -light response were not significantly affected. Fifteen days after honeydew substitute application, the two experimental years yielded different results. Under hot and dry conditions, the rate of dark respiration was higher while the rate of carbon dioxide assimilation at high irradiance, the mesophyll conductance and the leaf nitrogen content were lower than for the untreated control. In addition, chlorotic symptoms were visible. At moderate temperature and relative humidity, the initial light use efficiency was significantly lower fifteen days after treatment with honeydew substitute whereas other parameters were not significantly affected.In field experiments at two locations natural aphid populations consisting of mainly S. ave11ae were treated weekly with an aphicide from crop development stages DC 71, 73, 75 and 77, respectively, to create infestations of different size and duration. In the unsprayed controls densities reached 15.8 and 44.4 aphids per tiller, amounting to 182 and 544 aphid-days, respectively. Crop samples were analysed weekly, starting at flowering. At the smaller natural infestation, no significant effect on any yield component nor on yield was found at any treatment. The larger infestation caused a significant reduction of leaf area index, leaf weight, amount of water-soluble carbohydrates and grain weight on various sample dates when the infestation was not sprayed before DC 75. No effects were found on tiller and grain density nor on nitrogen content of plant parts at harvest.

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“…WRATTEN et al, 1979) zu Grunde gelegt. Entsprechend den hier errechneten Indices betragt der BI von HOLT et al (1984) c. 800 (Faktor nach ROSSING, 1991). Derartig hohe Verluste konnen durch die vorliegenden Ergebnisse weder bestatigt noch hinreichend erklart werden.…”

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“…HOLT et al (1984) fur M . dirhodum Ertragsverluste von bis zu 30%; der Befall in ihrem Versuch entsprach einem BI von 500 (EC 65-77).…”

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Vergleichende Untersuchungen zum Schadpotential der Getreideblattlausarten Metopolophium dirhodum (Wlk.) und Sitobion avenae (F.) in Winterweizen

Niehoff

Stablein

1998

J Applied Entomology

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: Investigations on the damage potential of cereal ahpids (Metopolophium dirhodum [Wlk.], Sitobion avenae [F.]) in winter wheat: The damage potential of the cereal aphids. S. avenae and M. dirhodum was investigated in winter wheat. Ears and flagleafs were artificially infested with different aphid densities between EC 65 and EC 83 using ear‐ and flagleaf cages. The aphid densities were adjusted to the initial densities every third day. Aphid damage is related to density and duration of infestation. Therefore the aphid infestation was quantified in terms of aphid days per ear or flagleaf. Yield was measured by calculating drymass, thousand kernel weight (TKW), kernals per ear and nitrogen content. The results show that S. avenae at the ear caused significant higher reduction in drymass and TKW compared to M. dirhodum on the flagleaf. Based on the relationship between aphid infestation and yield (drymass and TKW), the damage factor for S. avenae on the ear was 1.7 times (drymass) and 2 times (TKW) higher compared to M. dirhodum on the flagleaf. There was no clear relationship between aphid infestation and the relative nitrogen content. Zusammenfassung In einem Winterweizenbestand wurde das Schadpotential der Getreideblattlausarten S. avenae und M. dirhodum untersucht. Dazu wurden verschiedene Ertragsparameter erfaßt: Massenertag (TM), Tausendkorngewicht (TKG), Kornzahl je Ähre und Proteingehalt. Ab Mitte der Blüte (EC 65 – EC 83) wurden verschiedene Blattlausdichten in Ähren‐ und Fahnenblattkäfige eingesetzt und in dreitägigen Intervallen kontrolliert. Zur exakten Wiedergabe des Befalls wurde der Blattlausindex (Blattlaustage pro Ähre bzw. Fahnenblatt) berechnet. Es zeigte sich, daß S. avenue an der Ähre zu deutlich stärkeren Ertragsreduktionen (TM und TKG) führte als M. dirhodum am Fahnenblatt. Anhand von Regressionskoeffizienten war das Schadpotential von S. avenue um den Faktor 1,7 (TM) bzw. 2 (TKG) höher im Vergleich zu M. dirhodum. Zwischen dem relativen Proteingehalt und dem Blattlausbefall zeigte sich keine deutliche Beziehung.

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The influence of wheat growth stage on yield reductions caused by the rose‐grain aphid, Metopolophium dirhodum

Cited by 26 publications

References 5 publications

Jasmonic acid induces resistance to economically important insect pests in winter wheat

Jasmonic acid induces resistance to economically important insect pests in winter wheat

Simulation of damage in winter wheat caused by the grain aphid Sitobion avenae. 1. Quantification of the effects of honeydew on gas exchange of leaves and aphid populations of different size on crop growth

Vergleichende Untersuchungen zum Schadpotential der Getreideblattlausarten Metopolophium dirhodum (Wlk.) und Sitobion avenae (F.) in Winterweizen

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