Monitoring saddle gall midge (Haplodiplosis marginata) larvae and adult emergence
Pests /
PR516 /
Published: 30 July 2013
The aim of this eight month study was to record development of saddle gall midge larvae and pupae, and the timing of adult emergence. This work was undertaken to determine whether monitoring of soil stages of this pest can provide a useful indication of the risk and timing of adult emergence |
Integrated management of cyst nematodes in oilseed rape
Pests /
SR21 (PhD) /
Published: 24 June 2013
This project aimed to: assess the distribution and potential yield losses caused by cyst nematodes in OSR, provide management advice to minimise current and future crop losses and investigate the effect of temperature on H. schachtii development. |
Implications of the restriction on the neonicotinoids – imidacloprid, clothianidin and thiamethoxam on crop protection in oilseeds and cereals in the UK
Pests /
RR77 /
Published: 10 June 2013
On 24 May 2013 a restriction on the use of three pesticides (clothianidin, imidacloprid and thiamethoxam) belonging to the neonicotinoid group was adopted by the European Commission. The restriction will come into force as of 1 December 2013 and will be reviewed (though not necessarily rescinded) within two years. It targets pesticides used in the treatment of crops attractive to bees and for cereals, with the exception of uses in greenhouses and uses after flowering. Of the crops of interest to HGCA, the Commission’s decision affects all oilseed crops, all maize crops, and any cereal crops sown between January and June. |
Development of an integrated pest management strategy for control of pollen beetles in winter oilseed rape
Pests /
PR504 /
Published: 5 February 2013
We have developed an integrated pest management strategy (IPM) for pollen beetles in winter oilseed rape (OSR) based on risk assessment, monitoring and alternative crop management that can be used as a framework by growers and crop consultants to manage pollen beetles with reduced insecticide inputs – and the confidence to do so. |
Biopesticides for the control of storage insect pests
Feed and food safety /
PR507 /
Published: 4 February 2013
The work has concentrated on two different fungal isolates, both of which were found from insects in UK grain stores. The main objectives of the current project were:
1. To improve the efficacy of the insect-specific fungi when in contact with insects.
2. To improve the delivery of the insect-specific fungus to the insects.
3. To ensure the consistency and the safety of the product.
4. To ensure that the biopesticide product has wide acceptability and is effective under practical use. |
Desk study to evaluate contributory causes of the current yield plateau in wheat and oilseed rape
Genetics /
PR502 /
Published: 13 November 2012
To address the lack of progression in UK average farm yields for wheat and oilseed rape, national yield trends were analysed in relation to cropped area, genetic improvement, weather patterns, economic influences, crop nutrition and protection, plus other aspects of agronomy (project 3760). |
New environmentally-friendly technologies for slug control based on orally-delivered fusion proteins containing specific molluscicidal toxins
Pests /
PR499 /
Published: 11 September 2012
The aim of this project was to investigate the potential for a novel technology, originally conceived and developed for the control of insect pests, to be extended for the control of mollusc crop pests, with focus on the grey field slug Deroceras reticulatum.
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Sustaining the effectiveness of new insecticides against aphid pests
Pests /
PR497 /
Published: 13 August 2012
The overall aim of the project was to gain a clearer understanding of the incidence of insecticide
resistance in several important UK aphid pests (the peach-potato aphid, Myzus persicae, the
potato aphid, Macrosiphum euphorbiae, and the currant-lettuce aphid, Nasonovia ribisnigri) leading
to practical recommendations for using and maintaining as wide a range of effective aphicides as
possible for their control |
Re-evaluating thresholds for pollen beetle in oilseed rape
Pests /
PR495 /
Published: 2 July 2012
The aim of this project was to produce up-to-date thresholds for pollen beetle control by relating the potential for pest damage to the inherent tolerance of the crop to pest damage. The arrival of insecticide resistant pollen beetle in the UK makes it imperative that treatments are not applied unless really necessary to protect yield. The project hypothesises that oilseed rape crops produce significantly more flowers than required to produce the optimum pod number to maximise yield so there are excess flowers, which could be sacrificed to pollen beetle attack before yield is lost. |
Ecology and control of saddle gall midge, Haplodiplosis marginata von Roser (Diptera; Cecidomyiidae)
Pests /
RR76 /
Published: 26 April 2012
The saddle gall midge, Haplodiplosis marginata, is a sporadic pest in the UK and central and northern Europe.
Adults emerge from overwintering sites in the soil to mate and lay eggs on cereals (primarily wheat and barley, rarely oats) and grasses, especially couch grass, Agropyron repens, at the stem extension stage (GS31-39). Eggs hatch and larvae crawl down the stem to feed under the leaf sheath, where their feeding causes characteristic saddle-shaped galls. These galls restrict movement of nutrients to the ears, resulting in weak stems and small or blind ears. This causes yield losses when there are more than 5-7 galls per tiller. Damage is locally important on heavy soil types where wheat and/or barley are grown in continuous rotation.
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