Home
Posts
Article
Encyclopedia
Garden
Set
English
  

Aphids

Dummer. ゛☀
2017-09-15
Colonies of aphids can be found in clusters on soft new growth of a wide variety of plants. Buds, tips of stems and the undersides of leaves are all good places to look. Aphids come in many different colours from common greenfly and blackfly to yellows, browns and whites. Many species are specific to one group of plants but they all need to be dealt with in a similar way.
Plants affected
From time to time, aphids may attack almost any garden plant.
About
Adult aphids are rarely more than 3mm long and are elliptical in shape.
Large colonies can cover areas on the youngest sections of stems, and the undersides of leaves and sometimes on flower-buds.
During the warmer months aphids give birth to as many as five live young a day, so large colonies can develop very quickly.
When the colonies become over-populated, they move to different locations by producing winged aphids.
During the cooler months, aphids mate and produce eggs which over-winter.
Aphids feed on plant sap and excrete plant sugars as honeydew.
Honeydew often covers the leaves of a plant and then becomes infested with black sooty moulds.
Treatment
Chemical
Lambda-cyhalothrin and deltamethrin are both contact insecticides which are effective only when sprayed directly onto the aphids. A suitable systemic insecticide is thiacloprid which is taken in through the leaves and is taken up by the feeding aphids. Naturally occurring insecticides such as pyrethrum and fatty acids can also be used.
Note: It is important to read manufacturer's instructions for use and the associated safety data information before applying chemical treatments.
Organic
Encourage natural predators such as ladybirds and lacewings and insectivorous birds.
Have patience – when aphid populations peak, predatory insects will soon move in. Often this is when people lose their nerve and turn to sprays and, in doing so, kill all the natural predators too.
Don’t over-feed plants. Too much fertilizer will lead to lots of soft, sappy growth which will encourage aphid attacks.
Consider planting a sacrificial crop near to vegetables. For example, nasturtiums which attract black-fly away from brassicas.
Infestations in greenhouses or conservatories can be effectively treated with a biological control such as ladybird larvae.
0
0
Article
comment
😀 😁 😂 😄 😆 😉 😊 😋 😎 😍 😘 🙂 😐 😏 😣 😯 😪 😫 😌 😜 😒 😔 😖 😤 😭 😱 😳 😵 😠
* Only support image type .JPG .JPEG .PNG .GIF
* Image can't small than 300*300px
Nobody comment yet, write down the first!
Just Reply
Latest Article
Elite Article
Related Articles
FeedBack

You have any problems or suggestions, please leave us a message.

Please enter content
Download GFinger APP

Scan QR code, download GFinger APP to read more.

QR Code

Scanning QR Code, directly to see the home page

Switch Language
Set
VIP
Sign out
Share

Share good articles, GFinger floral assistant witness your growth.

Please go to the computer terminal operation

Please go to the computer terminal operation

Forward
Insert topic
Remind friend
Post
/
Submit success Submit fail Picture's max size Success Oops! Something wrong~ Transmit successfully Report Forward Show More Article Help Time line Just Reply Invite you to chat together! Expression Add Picture comment Only support image type .JPG .JPEG .PNG .GIF Image can't small than 300*300px At least one picture Please enter content