The influence of nitrogen fertiliser on the population development of the cereal aphids Sitobion avenae (F.) and Metopolophium dirhodum (Wlk.) on field grown winter wheat

AbstractBaseline toxicity measurements established discriminating concentrations of pirimicarb and demeton-S-methyl guaranteed to kill susceptible examples of Aphis fabae Scop., Sitobion avenae (F.), Metopolophium dirhodum (Wlk.) and Rhopalosiphum padi (L.) in the dip-test, the FAO-recommended method for detecting resistance in aphids. There was no evidence for resistance to either insecticide in field-collected populations of aphids from various parts of the UK or amongst variants of S. avenae characterised by staining their esterases after electrophoresis. New, simple techniques for rearing large numbers of colonies of cereal aphids are described.

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Predicting aphid abundance on winter wheat using suction trap catches

Plant Protection Science ◽

10.17221/53/2019-pps ◽

2019 ◽

Vol 56 (No. 1) ◽

pp. 35-45

Author(s):

Alois Honěk ◽

Zdenka Martinková ◽

Marek Brabec ◽

Pavel Saska

Keyword(s):

Winter Wheat ◽

Crop Protection ◽

Flight Activity ◽

Cereal Aphids ◽

Metopolophium Dirhodum ◽

Suction Traps ◽

Suction Trap ◽

Trap Catches ◽

Total Suction ◽

Aphid Abundance

The relationship between the number of cereal aphids in flight (recorded by a national grid of suction traps in the Czech Republic) and their occurrence on winter wheat (in Prague) was established between 1999–2015. The flight of all the species was bimodal. Except for Rhopalosiphum padi, whose flight activity peaked in autumn, > 80% of individuals were trapped during April to mid-August. The species frequency was different between the winter wheat and aerial populations. R. padi, the dominant species in the trap catches, formed a small proportion of the aphids on the winter wheat, while Sitobion avenae and Metopolophium dirhodum, which were underrepresented in the suction traps, alternately dominated the populations on the wheat. The aphid abundance in the wheat stands was correlated with the suction trap catches in the “spring” peak (April to mid-August), and the maximum flight activity occurred 4–10 days after the peak in the number of aphids on the wheat. In contrast, the prediction of the aphid abundance in the wheat stands using the total suction trap catches until the 15th of June (the final date for the application of crop protection actions) was reliable only for M. dirhodum. Its maximum abundance on the wheat exceeded 40 aphids per tiller if the total suction trap catch until the 15th of June was ≥ 60 individuals per trap. The prediction of R. padi and S. avenae abundance using the suction trap catches was not reliable.

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A field evaluation of different criteria for determiningthe need to treat winter wheat against the grain aphid Sitobion avenae and the rose-grain aphid Metopolophium dirhodum

Annals of Applied Biology ◽

10.1111/j.1744-7348.1994.tb04128.x ◽

1994 ◽

Vol 124 (2) ◽

pp. 195-211 ◽

Cited By ~ 21

Author(s):

J N OAKLEY ◽

K F A WALTERS

Keyword(s):

Winter Wheat ◽

Field Evaluation ◽

Sitobion Avenae ◽

Metopolophium Dirhodum ◽

Grain Aphid ◽

The Rose

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Management of cereal aphid (Hemiptera: Aphididae) populations and their natural enemies in winter wheat by alternate strip spraying with a selective insecticide

Bulletin of Entomological Research ◽

10.1017/s0007485300012190 ◽

1987 ◽

Vol 77 (4) ◽

pp. 677-682 ◽

Cited By ~ 5

Author(s):

Nick Carter

Keyword(s):

Winter Wheat ◽

Natural Enemies ◽

Natural Enemy ◽

Rhopalosiphum Padi ◽

Population Development ◽

Cereal Aphid ◽

Metopolophium Dirhodum ◽

Peak Density ◽

Selective Insecticide ◽

Similar Peak

AbstractThe effect on aphid population development of creating natural enemy refuges by spraying only alternate strips of winter wheat with the aphid-specific insecticide pirimicarb at 140 g a.i./ha was compared with those in an unsprayed and a completely sprayed block in south-eastern England. The numbers of Sitobion avenae (F.), Metopolophium dirhodum (Walker) and Rhopalosiphum padi (L.) increased rapidly in the unsprayed block and in the unsprayed strips to reach similar peak densities in early August. Natural enemy activity was similar in these two areas, indicating negligible movement of predators and parasitoids from the sprayed strips to the unsprayed strips. Instead, aphids re-colonized the sprayed strips more quickly than the sprayed block, and the peak density in the former was similar to those in the unsprayed areas.

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