Early Days
"A bit too early to know if the nematodes are working. There is evidence of whitefly. I would prefer an order where one can be sent a few every three weeks."
Whitefly Control - Encarsia
800
£8.00
Unit price perNB This predator is only active at temperatures in excess of 18-20°C
The most effective treatment for whitefly is the parasite "Encarsia". It is supplied on small cards which can be hung up around your plants. You can read the instructions for this product HERE.
Biological controls are not always kept in stock, they are ordered in fresh. This can sometimes lead to a time lag between when you place the order and when it is despatched. Order by 10am Monday for same week despatch.
Glasshouse whitefly are small white flying insects which lay eggs on the undersides of leaves. Whiteflies suck sap from their host plant and drop sticky secretions onto leaves below. Left uncontrolled they will overwhelm the plant, weakening it and flying around in huge numbers. Undersides of leaves become populated with Whiteflies adults and white eggs (scales).
Whitefly are fairly inactive in cool temperatures over Winter, but multiply very quickly in warm Spring and Summer weather. They fly about at the slightest disturbance, like tiny moths, and may even create ghostly white clouds in the air.
Instructions for use
Encarsia works best with temperatures above 21°C but prefer cool glasshouse conditions below 25°C with 12hr+ daylight hours. Generally, this means introducing Encarsia from mid March to August, although it can be earlier or later with extra heat and light.
Hang cards on lower branches so that they may be in a slightly shady position.
5 cards should give good control for an average conservatory or small greenhouse. If you have a longstanding battle with whitefly follow up the initial treatment with a second introduction one weeks later. If you have a low lever of whitefly or are using Encarsia as a preventative method then application can be every 2 weeks.
Identifying Whitefly
Remember whiteflies are nearly always moving. If you see white threads static on tops of the leaves, they are not whitefly but something else - very likely to be shed aphid skins dropped down from developing Aphid under leaves above. Or they could be thrips larvae. They are not "whitefly" unless body and wings are a ghostly white.
The glasshouse whitefly (Trialeurodes vaporariorum)is the most common. You can recognise them by their heart-shape profile when looked from above. Tobacco whitefly (Bemisia tabaci) have parallel wings which are longer, and when folded you can still see a strip of their back between the wings. There are up to 50 different species of whitefly in Europe, but from a gardeners point of view they are all plant pests.
Although Encarsia is very effective for the common glasshouse whitefly, it doesn't work so well for tobacco whitefly. It's therefore worth trying to identify what whitefly you have before treating. If you need any help identifying the whitefly you have then please don't hesitate to contact us.
Whitefly Control - Encarsia
800
£8.00
Unit price perNB This predator is only active at temperatures in excess of 18-20°C
The most effective treatment for whitefly is the parasite "Encarsia". It is supplied on small cards which can be hung up around your plants. You can read the instructions for this product HERE.
Biological controls are not always kept in stock, they are ordered in fresh. This can sometimes lead to a time lag between when you place the order and when it is despatched. Order by 10am Monday for same week despatch.
Glasshouse whitefly are small white flying insects which lay eggs on the undersides of leaves. Whiteflies suck sap from their host plant and drop sticky secretions onto leaves below. Left uncontrolled they will overwhelm the plant, weakening it and flying around in huge numbers. Undersides of leaves become populated with Whiteflies adults and white eggs (scales).
Whitefly are fairly inactive in cool temperatures over Winter, but multiply very quickly in warm Spring and Summer weather. They fly about at the slightest disturbance, like tiny moths, and may even create ghostly white clouds in the air.
Instructions for use
Encarsia works best with temperatures above 21°C but prefer cool glasshouse conditions below 25°C with 12hr+ daylight hours. Generally, this means introducing Encarsia from mid March to August, although it can be earlier or later with extra heat and light.
Hang cards on lower branches so that they may be in a slightly shady position.
5 cards should give good control for an average conservatory or small greenhouse. If you have a longstanding battle with whitefly follow up the initial treatment with a second introduction one weeks later. If you have a low lever of whitefly or are using Encarsia as a preventative method then application can be every 2 weeks.
Identifying Whitefly
Remember whiteflies are nearly always moving. If you see white threads static on tops of the leaves, they are not whitefly but something else - very likely to be shed aphid skins dropped down from developing Aphid under leaves above. Or they could be thrips larvae. They are not "whitefly" unless body and wings are a ghostly white.
The glasshouse whitefly (Trialeurodes vaporariorum)is the most common. You can recognise them by their heart-shape profile when looked from above. Tobacco whitefly (Bemisia tabaci) have parallel wings which are longer, and when folded you can still see a strip of their back between the wings. There are up to 50 different species of whitefly in Europe, but from a gardeners point of view they are all plant pests.
Although Encarsia is very effective for the common glasshouse whitefly, it doesn't work so well for tobacco whitefly. It's therefore worth trying to identify what whitefly you have before treating. If you need any help identifying the whitefly you have then please don't hesitate to contact us.
Overall rating: 4.4 / 5 from 10 reviews.
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Reviews
They work!
"Ever since buying Encarcia tags, I’ve not had a whitefly problem in a greenhouse with tomatoes and chillies. Touch wood, as ever. But they do seem to work and this morning, via a stereoscope, I watched them emerging as adult wasps - so even if the tag looks a bit dull, it’s likely to be full of life. Service and price excellent."
Not sure
"As we gardeners know, everything is dependent on the weather. l suspect my Encarsia died in their beds because it was so, so cold in out greenhouse for July. Highs of 22, lows of 12. Surprised the whitefly did so well!"
At last, something that works
"I’ve used Encarsia for four years in my tomato growing greenhouse. The first year they didn’t really control whitefly until late in the season. Last three years, control has been excellent. I now plant basil in between each tomato plant, so maybe that helps. Or not. Whatever, I haven’t seen a whitefly for three years. And Ladybird I find an absolute delight to deal with."
Good Choice
"As usual I was quick to find fault with the purchase. I had expected an instant result (idiot) but after re-reading the instructions all became quite clear. After a two week period I found a number of wasps flying around the greenhouse, GREAT. The number of whitefly as greatly reduced thank goodness as I have a rather large mass of the blighters. So, YES, do try these as the results are well worth while."
Wasps to the rescue
"The embryo eggs on the cards hatched within two days and the wasps were seen before they got to work on the whitefly scales. Waiting to see results."
Whitefly co trol
"I identified these quite early with just a few on my tomatoes at the end of June, and decided to try encarsia as the exclusive control. Two weeks later, after a very warm period, the plants are free of infection. Very happy with this, so much better than chemical control."
Worked brilliantly
"Very happy. White fly all gone in less than 2 weeks."
Delivery delayed because of bank
"Delivery delayed because of bank holiday, received Sat after Mon despatch. Hope they were still alive!"
White fly control
"I have Snow Banana plants now 5' tall growing in my garden room. These have attracted white fly with associated damage to the leaves. A combination of manual cleaning with horticultural soap and Encarsia treatment appears to have resolved the problem"
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