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| Kienzle, Jutta; Kopp, Barbara; Schulz, Christof. |
| In the last years the contro I 01 the apple sawfly Hoplocampa testudinea Klug was not efficient in organic Iruit growing. This was due to quality problems 01 the "Quassia wood" used lor the treatments. First orientating criteria based on one 01 the active ingredients, Quassin, were established lor the quality 01 "Quassia" preparations. A lield test on apple sawfly showed, that the quantity 01 Quassin per ha required lor good sawfly control is about 12-18 9 Quassin. In the nex! years, more active ingredients (Le. Neoquassin) have to be included in the quality criteria and evaluated by biotests. Only this way, reliable recommendations can be given to the growers. NeemAzal-T/S was effective only against the secondary inlestation. Thus, it can be recommended... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2002 |
URL: http://orgprints.org/14592/1/kienzle_28.pdf |
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| Kienzle, Jutta; Schulz, Christof; Zebitz, Claus P.W.; Huber, Juerg. |
| In 2000 and 2001, in a field trial, the persistence of the biological effect of codling moth granulovirus (CpGV) was investigated. With a single treatment at full concentration of CpGV (MADEX 3, 100 ml/ha) a considerable reduction of CM population was achieved over the whole vegetation period. This may indicate that over a considerable period of time after a treatment a biological effect of CpGV sufficient for an increased mortality of the larvae was present in the orchard. However, the onset of mortality was not fast enough to protect the fruit from damage. Further research has to be done to gain more experience in handling this effect. It could be very important for the reduction of the number of treatments in organic apple growing. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2002 |
URL: http://orgprints.org/14625/1/kienzle_187.pdf |
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