Does the assessment of eggs in Ceutorhynchus pallidactylus and C. napi ovaries in spring make possible a date for one common spray treatment effective against the weevils and even pollen beetles?

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26784246%3A_____%2F18%3AN0000035" target="_blank" >RIV/26784246:_____/18:N0000035 - isvavai.cz</a>

Result on the web

<a href="https://www.iobc-wprs.org/members/shop_en.cfm?mod_Shop_detail_produkte=207" target="_blank" >https://www.iobc-wprs.org/members/shop_en.cfm?mod_Shop_detail_produkte=207</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Does the assessment of eggs in Ceutorhynchus pallidactylus and C. napi ovaries in spring make possible a date for one common spray treatment effective against the weevils and even pollen beetles?

Original language description

SEIDENGLANZ, M., ŠAFÁŘ, J., RUBIL, N., RUSEŇÁKOVÁ, M., ROSKÓOVÁ V. (2018): Does the assessment of eggs in Ceutorhynchus pallidactylus and C. napi ovaries in spring make possible a date for one common spray treatment effective against the weevils and even pollen beetles? IOBC-WPRS Bulletin, Vol. 136: 114-125. ISBN 978-92-9067-321-7. This study aims to improve timing of foliar insecticides against cabbage stem (Ceutorhynchus pallidactylus) and rape stem (C. napi) weevils at localities where C. pallidactylus usually highly predominates in relation to C. napi during spring. We also aim to address the question whether the stem mining weevils and pollen beetles could be controlled with one spring application when the spray timing is based on proper monitoring of the pests in oilseed rape crops. In the case when only one spring application was used, pyrethroids showed better results in decreasing the levels of stem damage induced by the larvae when they were applied earlier (first females prepared for oviposition). Conversely the combination of organophosphate + pyrethroid is better applied later (when more than 50% females are prepared for oviposition). The use of a combination of organophosphate and pyrethroid makes the delay in the date of first spring spraying more well-founded and it is more suitable when a farmer plans to combine control of stem weevils with control of pollen beetles. So, not only the detailed monitoring of flight activity and the subsequent dissecting of stem weevil females but also the choice of insecticide with substantially longer residual activity is important for the possibility to delay the first spring spray to later dates (and later growth stages).

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

40106 - Agronomy, plant breeding and plant protection; (Agricultural biotechnology to be 4.4)

Project

<a href="/en/project/QJ1610217" target="_blank" >QJ1610217: Innovation of integrated pest management of oilseed rape to reduce negative effects of current cultivation technology</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů