Epidemiology of Cereal Aphids on Winter Wheat in Norfolk, 1978-1981

1984 ◽  
Vol 21 (1) ◽  
pp. 103 ◽  
Author(s):  
S. R. Leather ◽  
Nick Carter ◽  
K. F. A. Walters ◽  
J. R. Chroston ◽  
N. Thornback ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Cereal Aphids

scholarly journals Monitoring for cereal aphids in winter wheat

1981 ◽  
Vol 87 (1) ◽  
pp. 25-29 ◽  
Author(s):  
R. Rabbinge ◽  
W. P. Mantel
Keyword(s):  
Winter Wheat ◽  
Cereal Aphids

scholarly journals Predicting aphid abundance on winter wheat using suction trap catches

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.

scholarly journals Transgenic Winter Wheat Expressing the Sucrose Transporter HvSUT1 from Barley does not Affect Aphid Performance

Insects ◽  
2019 ◽  
Vol 10 (11) ◽  
pp. 388 ◽  
Author(s):  
Yang ◽  
Kloos ◽  
Mora-Ramírez ◽  
Romeis ◽  
Brunner ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Rhopalosiphum Padi ◽  
Aphid Species ◽  
Sucrose Transporter ◽  
Yield Potential ◽  
Cereal Aphids ◽  
Biotic Stresses ◽  
Transgenic Lines ◽  
Negative Impacts ◽  
Parental Cultivar

Winter wheat expressing the sucrose transporter HvSUT1 from barley (HOSUT) has an increased yield potential. Genetic engineering should improve cultivars without increasing susceptibility to biotic stresses or causing negative impacts on ecosystem services. We studied the effects of HOSUT wheat on cereal aphids that feed on the sugar-rich phloem sap. Three HOSUT winter wheat lines, their conventional parental cultivar Certo, and three conventional cultivars were used. Clip cage experiments in the greenhouse showed no differences in life-table parameters of Rhopalosiphum padi and Sitobion avenae (Hemiptera: Aphididae) on transgenic lines compared to Certo, except higher fecundity of S. avenae on one HOSUT line. Population development of both aphid species over three weeks on caged flowering tillers did not reveal differences between the HOSUT lines and Certo. When aphids were monitored in a Swiss field study over two years, no differences between HOSUT lines and Certo were observed. We conclude that HOSUT wheat did not have consistent effects on aphids compared to the parental cultivar and measured parameters were generally in the range observed for the conventional winter wheat cultivars. Thus, HOSUT wheat is unlikely to suffer from increased aphid damage.

Preference of cereal aphids for different varieties of winter wheat

2012 ◽  
Vol 6 (3) ◽  
pp. 345-350 ◽  
Author(s):  
Nathalie De Zutter ◽  
Kris Audenaert ◽  
Geert Haesaert ◽  
Guy Smagghe
Keyword(s):  
Winter Wheat ◽  
Cereal Aphids

Observations on changes in the female reproductive system of the wheat bulb fly Leptohylemyia coarctata (Fall.)

1971 ◽  
Vol 61 (1) ◽  
pp. 55-68 ◽  
Author(s):  
Margaret G. Jones
Keyword(s):  
Winter Wheat ◽  
Reproductive System ◽  
Follicular Epithelium ◽  
Cereal Aphids ◽  
Nurse Cells ◽  
Female Reproductive System ◽  
Egg Development ◽  
Sugar Water ◽  
The Third ◽  
Water Traps

In Leptohylemyia coarctata (Fall.) the germarium cuts off oocytes which develop through the stages 00 and 0 and I-V, recognised in other Cyclorraphous flies, in 4–5 weeks. All eggs of one batch of the gonadotrophic cycle ripen at the same time. After oviposition, the split intima, the remains of the follicular epithelium, and the nurse cells slowly contract to form the follicular relic. Flies swept from winter wheat during June and July and caught in water traps in July and August showed all stages of egg development. In 1970, 24·7% of the females swept from the crop had completed the first, 4–7% the second and 0–4% the third gonadotrophic cycle. All the eggs were not laid at the same time. During later gonadotrophic cycles, some ovarioles were non-functional. Flies laid one or two batches of eggs, rarely three. In 1970, many flies were attacked and killed by E. muscae. Only one out of 115 newly emerged female wheat bulb flies presented with foods usually found in the crop or citrated blood contained mature eggs after 24–27 days in small cages. Those fed only on 0·1 M glucose survived but did not deposit yolk in the ovum; those provided only with yeast paste died. Honey dew from cereal aphids was the main source of sugar. Water in droplet form and space to move seem necessary for the maturation of the eggs.

scholarly journals Hymenopteran parasitoids (Hymenoptera: Aphidiidae) of cereal aphids (Sternorrhyncha: Aphidoidea) in winter wheat crops in Slovakia

2011 ◽  
Vol 39 (No. 3) ◽  
pp. 97-102 ◽  
Author(s):  
J. Praslička ◽  
S. Al Dobai ◽  
J. Huszár
Keyword(s):  
Winter Wheat ◽  
Aphidius Ervi ◽  
Cereal Aphids ◽  
Aphidius Rhopalosiphi ◽  
Aphid Parasitoids ◽  
Hymenopteran Parasitoids

During 1997–1999, occurrence of hymenopteran parasitoids of cereal aphids was observed in different localities in Slovakia. Altogether, seven species of aphid parasitoids were recorded. The total numbers of particular species over the last three years were as follows: Aphidius uzbekistanicus (160 individuals – 42.4%), Aphidius ervi (83 individuals – 22.0%), Aphidius rhopalosiphi (66 individuals – 17.5%), Ephedrus plagiator (40 individuals – 10.6%), Praon volucre (26 individuals – 6.9%), P. gallicum (1 individual – 0.3%), and Aphidius picipes (1 individual – 0.2%). The abundance of the parasitoids in each year was: 185 individuals (49.1%) in 1999, 122 individuals (32.4%) in 1998, and 70 individuals (18.6%) in 1997.  

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