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Can I read A survey of aphids and aphid parasitoids in cereal fields in Denmark, and the parasitoids' role in biological control on EtoBox?
A survey of aphids and aphid parasitoids in cereal fields in Denmark, and the parasitoids' role in biological control by L. Sigsgaard is a Agricultural and Biological Sciences article available to read on EtoBox.
What is A survey of aphids and aphid parasitoids in cereal fields in Denmark, and the parasitoids' role in biological control about?
In 1996 and 1997 a field survey of the abundance and species composition of cereal aphid primary and secondary parasitoids in spring barley, winter wheat and durum wheat was conducted in Zealand, Denmark. The purpose was to create a better understanding of the mechanisms underlying aphid–parasitoid dynamics in the field. Such an understanding can be used when developing biological control methods in cereals. In both years aphid attacks in cereals began in late June and never exceeded the economic threshold. In 1996 the first aphids were found in wheat on 26 June; in 1997 the first aphids were found on 24 June on both crops. The highest densities reached in 1996 were an average of six aphids per shoot in winter wheat and one aphid per shoot in spring barley. In 1997 the highest densities reached were 11 aphids per shoot in winter wheat and four aphids per shoot in spring barley. The aphid population collapsed by the end of July to early August in 1996, but it collapsed by mid‐July in 1997. The onset and peak of parasitization were delayed in comparison to aphid infestation. Parasitism was 20–60% by the end of the cropping season in spring barley, and 30–80% in winter wheat and durum
Who reads A survey of aphids and aphid parasitoids in cereal fields in Denmark, and the parasitoids' role in biological control?
It is typically read by researchers, students, and practitioners in Agricultural and Biological Sciences.
- Author
- L. Sigsgaard
- Publisher
- John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Verlag Paul Parey; Wiley (ISSN 0931-2048)
- Published
- 2002
- Language
- EN
- Field
- Agricultural and Biological Sciences (Life Sciences)