Scottish Rock Garden Club Forum
Specific Families and Genera => Pleione and Orchidaceae => Topic started by: Hans J on December 04, 2011, 04:19:05 PM
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Hi all,
Today I have written some questions to a german proper authority for plant protection what I can use here in Germany for fighting against Brevipalpus .
The reason for this was the information from Paul with Bifenthrin and Neem ....
This person has answered me very quick ( on same day ) :o
Here is the answer ( sorry only in german ) but maybe can anybody here translate it :
Die Falschen Spinnmilben der Gattung Brevipalpus sind ebenso wie andere Milben mittels der handelsüblichen Akarizide gut bekaempfbar.
Wichtig ist dabei, dass die Tiere getroffen werden oder über den Spritzbelag laufen. Zudem muss - wie bei anderen Milben auch - wiederholt behandelt werden. Bei 20 Grad sollte im 7-taegigen Abstand behandelt werden.
Wichtig ist Wirkstoffwechsel aufgrund der Resistenzgefahr.
Bifenthrin ist EU-weit nicht mehr zugelassen (seit Mai 2010).
Öle sind einsetzbar, egal ob Neem (die Zulassung endet demnächst, aber eine Anschlusszulassung kommt), Mineralöl- oder Rapsöl. Vorsicht bei wiederholter Behandlung drohen Schäden, ebenso bei über 25 Grad.
Behandlungen sind nur sinnvoll, wenn die Tiere vorhanden sind. Vorbeugende Spritzungen sind nur eine Belastung für Pflanzen, Umwelt und Geldbeutel.
Wie andere Milben auch, profitieren Falsche Spinnmilben von Wärme und Trockenheit.
Einsetzbare Akarizide im Haus- und Kleingarten:
Lizetan Spray (Wirkstoff Methiocarb muss enthalten sein)
Axoris Spray (Wirkstoff Abamectin muss enthalten sein)
Kiron
Kanemite
Nebenwirkung von BI58 oder Rogor
I think this answer is very helpful and so I would share it with all
Hans
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Hello Hans,
that's an interesting answer and I will translate it when I get a moment. Too tired now.
He says in the third paragraph that treatment should only be undertaken if there is evidence of the mites and that any preventative treatment is a strain on the plant, the ecology and one's purse. I don't totally agree with that. It assumes that it is easy to see the mite, which is not the case. If one strikes back after the damage has been done, I think that may be too late. My motto is "Prevention is better than cure".
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Hello Maren ,
I'm glad to read that anybody is interestet for my posting :D
After receiving the mail from this man I wrote him back and said a "Big Thank" for his work and the fast answer . Also I wrote him :
"Danke auch für den Hinweis das man vorbeugend nichts machen soll - die
englischen Gärtner empfehlen ein kurzes Eintauchen den Bulben in Neem oder
Mineralöl vor dem Umsetzen in neues Substrat."
He wrote back in a second mail :
Falls Befallsverdacht besteht koennte eine Tauchbehandlung vor dem Einpflanzen sinnvoll sein.
I think this is exactly what you mean !
Best wishes
Hans
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I've been a little bored at work, so I decided to practice translating:
Just like other mites, false spider mites of the genus Brevipalpus can be fought well with commercially available acaricides.
It is important that the animals are hit directly or walk over the spray film. Moreover - as with other mites - the treatment needs to be be repeated. At 20 °C, the plants should be treated at an interval of seven days.
Make sure to rotate the active ingredient to prevent resitances.
EU-wide, Bifenthrin is not approved anymore (since May 2010).
Oils can be used, no matter if neem (approval ends soon, but followup approval is on the way), mineral or rapeseed oil. Caution! Repeat treatments can cause damage, just as treatment at over 25 °C.
Treatment is only advisable if mites are present. Preventive sprayings are but a burden on plants, environment and wallets.
Like other mites, false spider mites profit from warmth and low humidity.
Applicable acaricides for garden and allotment:
Lizetan Spray (must contain active ingredient Methiocarb)
Axoris Spray (must contain active ingredient Abamectin)
Kiron
Kanemite
side effect of BI58 or Rogor
Thanks also for the advice to refrain from doing anything preventively - the English gardeners recommend briefly dipping the Bulbs into neem or mineral oil before transplanting them into new substrate.
In case of suspected infestation a dipping treatment before planting coud be advisable.
Greetings
Daniel
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Hallo Daniel ,
Many thanks for your translation ! ( much better that I could make it )
I hope it is now more useful for all interestet readers !!!
Hans