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| Schultz, Britta; Saucke, Dr. Helmut. |
| 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... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Crop combinations and interactions Weed management. |
| Ano: 2005 |
URL: http://orgprints.org/3786/1/3786.pdf |
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| Fittje, Susanne; Menzel, Dr. Wulf; Saucke, Dr. Helmut; Vetten, Dr. Heinrich-Josef. |
| An apparently new virus disease of carrots (Daucus carota) has gained increasing importance in Germany. The complex of symptoms consisting of leaf reddening, plant stunting, hairy and rat tailed roots is thought to be caused by viral infections. Particularly the main carrot growing areas in Lower Saxony are adversely affected. In field surveys in 2003 about 30 % symptomatic plants were observed with average weight losses of about 30 %. In severe cases symptom-related yield reduction was estimated to be 17 % on-farm, which corresponded to a monetary loss of up to 600 €/ha. In 2004 up to 6 % of the plants displayed virus like symptoms. Varietal differences in susceptibility were observed. In general, late maturing varieties for processing showed more... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Specific methods Vegetables. |
| Ano: 2005 |
URL: http://orgprints.org/3785/1/3785.pdf |
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| Ackermann, Kerstin; Saucke, Dr. Helmut. |
| The effect of mixed cropping semi-leafless peas with linseed dodder (Camelina sativa (L.) Crtz.) on weed development and pest incidence was investigated in small plot experiments in Northern Hessen, Germany, over two years. Mixed cropping peas together with linseed dodder had a significant suppressive effect on weed-coverage, in average 62 % efficacy in 2003 and 54 % in 2004, compared to mono cropped peas. The infestation level of pea aphid (Acyrthosiphon pisum) and the damage incidence of pea moth (Cydia nigricana) in harvested peas, was neither significantly reduced nor enhanced. In both years mixed cropping peas gained a relative surplus in yield compared to peas grown as a sole crop. The results demonstrate the advantageous complementary use of... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Crop combinations and interactions Weed management. |
| Ano: 2005 |
URL: http://orgprints.org/3788/1/3788.pdf |
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