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Einfluss verschiedener Saattermine auf den Erbsenwicklerbefall (Cydia nigricana Fabr.) in ökologischen Gemüseerbsen

Schultz, Britta and Saucke, Dr. Helmut (2005) Einfluss verschiedener Saattermine auf den Erbsenwicklerbefall (Cydia nigricana Fabr.) in ökologischen Gemüseerbsen. In: Heß, J and Rahmann, G (Eds.) Ende der Nische, Beiträge zur 8. Wissenschaftstagung Ökologischer Landbau, kassel university press GmbH, Kassel.

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Summary

The pea moth (Cydia nigricana) has developed to the most serious pest in organic green peas in recent years. In 2003 about 20 % of the contracted acreage needed to be rejected by the processing industry, due to the very low tolerance levels requiring at least 99,5 % (w/w) non affected high quality peas. The present study investigated the influence of different sowing dates on the damage level in green peas. In a small scale field experiment arranged in a complete randomized block design with four replicates three common cultivars suitable for early, mid and late sowings, namely Avola, Gonzo, Trompet, respectively, were utilized. Each variety was sown at an early and a late date, resulting in six sowing dates at total, covering the entire sowing period from mid March to mid May. Subsamples of 3 x 1,5m2/plot were harvested by threshing and pea moth related infestation was assessed as the percentage of damaged peas. Crop phenology was recorded in weekly inspections. Flight activity of male moths was monitored twice a week by pheromone traps. As a result, only the early sowing dates revealed damage levels below the required threshold of 0,5 %. Green peas sown after mid of April where increasingly affected, approaching 3-6 % damaged peas. Damage was closely related to the coincidence in time of a) flowering and the onset of maturing pods with b) the phenology of monitored pea moths. The onset of flowering did not depend only on the sowing date but also on the respective pea cultivar. As registered C. nigricana-control options are lacking as present, the described strategy of coincidence avoidance in combination with fast maturing cultivars appears to be the most suitable contribution in reducing the risk of pea moth attack in organic green peas.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Subjects: Crop husbandry > Crop health, quality, protection
Crop husbandry > Crop combinations and interactions
Crop husbandry > Weed management
Research affiliation: International Conferences > 2005: Scientific Conference on Organic Agriculture
Germany > University of Kassel > Department of Ecological Plant Protection
Deposited By: Saucke, Dr. Helmut
ID Code:3786
Deposited On:05 Mar 2005
Last Modified:12 Apr 2010 07:30
Document Language:German - Deutsch
Status:Published
Refereed:Peer-reviewed and accepted

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