How can i clear black fly?
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Answers:
That depends how "green" you want to be and whether you want to eat what they've been eating.
A systemic insecticide will make the plant poisonous to blackfly and will get rid of them. However, don't use this on runner beans or broad beans. (Although they do on the ones you get in the supermarket)
With beans, the best treatment is to wash them off using soapy water. This drowns them as well as removing them. If there are any withing a half mile radius, they'll come back a few days later, but keep washing them.
The organic treatment is to encourage aphis-eating creatures like ladybirds and lacewings and to plant plenty of pot marigolds - but that takes time and you've got blackfly now.
You can buy chemical sprays in garden centres... Not good if you're an organic gardener!
But if someone can also say how to get rid of black/green an organic way i would also be intrigued to hear!
:-)
Find some ladybirds or failing that squirt them with a spray of soapy water.
There is a insect dust for vegetables and plants. It's more localized than a spray.
It's available at any garden center, Lowe's or Home Depot.
Encourage ladybirds into your garden. Provide a place for them to over winter safely.
I also find that if I use a very weak solution of an envoromentally friendly washing up liquid this will wash them away and water the plants at the same time. I use the water from my rain butt and a watering can. You need to make sure the water flows over both sides of the leaf. Buy preditors from a reputable supplier. It's a never ending job. Good luck!
Of course, where you live may refer to Black Fly as something completely different from where I am. I live near Toronto.
Black fly season lasts here from mid-May for about 4 or 5 weeks and then goes away. These flies are annoying biters who prefer shade to sunlight and are active first and last thing in the day.
Before you spend a penny on beneficial bugs or insecticide soaps (the green way), you should identify the type of black fly. As far as I know, lady bugs eat aphids which crawl on plants (especially roses). Unless lady bugs eat the fly larvae, I cannot see how they would be effective.
either by spraying soapy water or jeyes fluid in water
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