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12 messages
01/09/2013 at 16:20

Hi All

Any ideas for the control or eradication of Red Spider Mite in my conservatory?

It is only for ornamentals.

Datura, Hibiscus and Bouganvillia.

Thanks

Spooky40

01/09/2013 at 16:42

 



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Spider Mite - Pests
Commonly asked question(s):

How do I get rid of spider mite? 
What are the little red spots on my Lotus, Black Eyed Susan, Yucca and Gloriosa? 
What are the spider webs on my ginger lilies?


Phytoseiulus persimilis are the most effective control against spider mite. This particular predator reproduces at twice the rate of spider mite. It is highly active under hot dry conditions, where just one mite of P. persimilis can consume 20 eggs or 5 adults per day! However, it requires a minimum temperature of over 16ºC (although daytime temperatures of 21 ºC are preferable) and there needs to be sufficient numbers of spider mite present for the predatory mites to feed on. Obviously, if you choose to use biological control then you cannot also use chemical control as this will kill the predatory mites!

There are a number of cultural practices that you can also use to help prevent and reduce outbreaks. Spider mite thrives in warm dry conditions, so damp down greenhouse floors and paths to increase the humidity. Regular inspection of the undersides of leaves will also help to detect the problem before it spreads. Pick off and burn any infested leaves when you find them. Finally, at the end of the growing season, make sure that you take time to really clean out your greenhouse properly as spider mites like to spend the winter hidden in dry crevices and plant debris until the weather warms up again in spring.



Phytoseiulus persimilis are the most effective control against spider mit
01/09/2013 at 17:27

Having used that predator mite (ie Phytoseiulus persimilis) myself, I can confirm it works.  It's really the only way of completely eradicating red spider mite from a conservatory as they have evolved to be immune to the sort of pesticides we gardeners have available.  SB plant invigorator (which doesn't contain pesticide) will also help to control them by sort of glueing them in place.  In fact, many of the predator suppliers will recommend that you use that a couple of weeks before you introduce the phtyoseiulus.  Not cheap, but they do exactly as it says on the tin (or small plastic bottle in this case!)

13/06/2015 at 07:55

Bob would this be any good?

 

http://www.qvcuk.com/Richard-Jackson-Plant-Invigorator.product.506492.html

13/06/2015 at 08:06

Looks a good product Maxine.

 Anyone tried it?  Is it too good to be true?  What does it contain?

13/06/2015 at 08:07

Check out a Sulphume product made by HOTBOX.

I now swear by this for clearing my greenhouse each years within two weeks.Kills any eggs on leaves etc at the same time..

Most of the large growers use the industrial version .

Costs of the vaporisor and sulphur can vary from site to site .So look around if intending to purchase.Once bought the sulphur will last for years as will the vaporisor.

Have tried everything else and they did not work and are probably much more lethal to yourself than this product.

A possible word of warning is that you might have to spring clean a conservatory as a harmless dust is created on windows.In the greenhouse it just adds to the effective long lasting sterile conditions which is great to also combat other foes , and I never remove it. 

Problem with mites is that they will not kill eggs and once the adults rs adults have been eaten the mites die, leaving eggs to hatch and off you go again.

13/06/2015 at 08:26
I've got it and it is good but never used it on red mites, and it's safe for pets and children xxx
13/06/2015 at 08:28
I don't have a greenhouse these have appeared in the garden, I'll get you a list of ingredients verdun xxxx
13/06/2015 at 08:43

Hiya it contains

 

foliar lattice

linear sulphanate

0.074% w/w iron chelate (fe)

1.914 w/w nitrogen (n)

natural products.

 

this is word for word from the label xxx

13/06/2015 at 09:51
I don't have a greenhouse these have appeared in the garden, I'll get you a list of ingredients verdun xxxx
13/06/2015 at 17:18

Hiya it contains

 

foliar lattice

linear sulphanate

0.074% w/w iron chelate (fe)

1.914 w/w nitrogen (n)

natural products.

 

this is word for word from the label xxx

13/06/2015 at 17:20

Thanks maxine 

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12 messages