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Weevil

This is a discussion on Weevil within the The Jungle forums, part of the Land Plants category; Oh, I am chiming in late, but I see the problem has been solved. I ...

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  1. #21
    Halloamey's Avatar
    Halloamey is offline Senior Member
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    Amey Bhide
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    Oh, I am chiming in late, but I see the problem has been solved. I also think it is a bad combination of wevil damgae followed by burn and rot. For the rot, I recommend using Subdue maxx (active ingredient Mefenoxam) in alteration with Hexaconazole or captan. As for the wevil, I think imidacloropid should help as Yew also suggested. I think pesticide rotation is the best option we have so that insects do not become resistant to them. I usually spray mine every week, one week they get imidacloropid and the next they week they get Diclorovos. As with recommendations of these chemicals, I suggest everyone read the safety data for these chemicals and handle them with care. Use protective gear, like a coat, googles and a mask to avoid direct contact and exposure.

  2. #22
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    Zainal Abidin Bin Othman
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    Thanks Amey for the valuable info and your recommendation I will follow Universal precaution to protect myself from direct contact.

  3. #23
    Dorsetman's Avatar
    Dorsetman is offline Senior Member
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    Geoff Hands
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    Quote Originally Posted by Halloamey View Post
    I usually spray mine every week,.
    Interesting. I know vanda nurseries in Thailand who spray against mites one week, against fungus the next week, weevils the third week and so on...ad infinitum

    I don't... ( spray, hardly at all) I'll tell you why.

    Other friends run a beautiful little orchid nursery in Belgium - most everything is seed raised from their own plants , all look excellent. I asked their advice about routine spraying once when I was there ; " oh we don't spray, they said, or hardly ever..." Why not ? "- "Well, whatever you spray and however you ventilate, there are traces left behind, and we ( proprietors - man and wife - and at least one son, all work in the business,) have to spend most of our days in there - in the greenhouses . It isn't good for one's health to be continually exposed to chemicals of this nature, even traces.
    Makes sense, to me.
    I also have to observe that between our own Government, and the EU, practically everything is banned. Provado (thiacloprid) is one of the very few we can use , and if I visit Bayer's web-site , I find that they advise using it no more than 3 times in one year. Since effective pest control ( for scale or mealy-bug , the only things I need spray for) requires three applications at 10-14 day intervals, that means I could only do one treatment per year anyway.

    So my system is if I find a badly infected plant , I throw it out of the collection; drastic, but maybe cheaper, apart from anything else . Although this is theory rather than practice -pests rarely get that bad in my collection.

    I only water plants by individual handling and dipping - no sloshing a watering can or hose-pipe or lance about. (I do spray a lot of plants very fequently , especially baskets using sphagnum moss as compost - but they still get dipped and handled individually maybe every week-10 days ). When I handle, I inspect. The odd pest gets spot treatment. That means a quick spray with 50:50 water and alcohol , using a paint brush to remove the pest, or a cotton wool ball.
    If I spot a pest when I am doing something else, I take that plant off the bench, and deal with the pest there and then ; it's no use saying to oneself, ah, yes, I shall remember which plant that was ( I won't - or if I do, the pest will have moved on by the time I get back).

    But I do recognise that in tropical countries, things might be a bit different, and need more action - although I know plenty of growers in cool old England who do the regular spraying routine - must cost a fortune, spend more on chewmicals than on plants ! I call that crazy.

  4. #24
    panam's Avatar
    panam is offline Senior Member
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    Patty
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    Quote Originally Posted by Dorsetman View Post
    So my system is ... When I handle, I inspect. The odd pest gets spot treatment. That means a quick spray with 50:50 water and alcohol , using a paint brush to remove the pest, or a cotton wool ball...
    Thanks, Geoff for your words of encouragement. I can't tolerate the poisons myself, so won't have them in the house.

  5. #25
    Brutal_Dreamer's Avatar
    Brutal_Dreamer is offline Dreaming with my eyes open...
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    Bruce Brown
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    First of all - good eye Pavel on spotting that mantis. I had to scroll back up and take another look.

    And about spraying - I agree it is not good for anyone's health, but sometimes I find it necessary to protect the orchids. In the past 16 or so years, we have had two pretty significant outbreaks of scale in the greenhouse on the cattleyas. I believe it is due in part to not keeping up with spraying and cleaning. Sometimes we just have to go in and spray really well all surfaces of every plant to protect the collection from pests. Never had weevils in there, but ants and scale keep me busy.

    Cheers,
    BD

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