Phoretic Garden Guests: What Is Phoresy?
phor·e·sy ( /ˈfôrəsē/)
Several years ago our Plant Health Care department noticed how despite some rooftop plants being totally isolated they suddenly got insects. We were perplexed and decided to investigate. That's when we learned about this very odd form of insect dispersal called PHORESY.
Phoresy is simply when one organism attaches itself and then travels on another without hurting it. It is a form of association where there is no parasitic relationship. It means literally “eating at the same table”. Basically they are hitching a ride for free!
Spider mites hitching a ride on a beetle !
The evolutionary adaptations
As we researched more were were fascinated by the complexity of this phenomenon and how it actually has been around long enough that some insects have evolved physical traits to enhance this method of transportation. We also discovered several of the insects we noticed that were popping up in our gardens had these evolutionary adaptations or were using this method to get around. For example - many mites have hooks used for grabbing - which evolved on their feet!
Flower mites are wingless but use foraging bees to travel to new flowers. When the bee enter a flower to collect nectar or pollen the mites climb on - when it reaches the next flower - the mites climb off !
Scale crawlers ( a just hatched stage of scale insect) attach themselves to other insects by means of sucker parts on their legs. They latch on and get dropped off once they arrived at a new location. Talk about evolution !!!!!
Some beetle larvae cling on to wasps and hitch a ride to the next bit of greenery. And mites will also latch on to a centipede then get off at the next available plant! ( crafty right !)
It is not just insects that do this but it has been shown to occur in some disease as well. “Fire blight” is a disease of apples and pears caused by the plant pathogen Erwinia amylovora. The bacterium is picked up on the feet and mouth parts of bees and flies when they visit flowers on diseased trees, and then are carried on to to healthy ones. The blight can be lethal to trees and extremely damaging to flowers.
The dreaded Erwinia
Rose buds and flowers damaged by Erwinia
The solution !
No worries garden people ! We here at Plant Specialists are aware of these tricky methods and have a battery of methods
to control and deal with both insects and diseases. We have a whole department dedicated to it –
Plant Health Care
.
For the best plant pest control - Call Plant Specialists TODAY !
Our PHC Team can help you battle the insects in your garden!
Don't delay – the sooner the better !
GREENING NEW YORK FOR OVER 52 YEARS !
Article written by our Staff Horticulturist, Peter B Morris, BSc, MSc, MBA
All photographs used with permission from @SHUTTERSTOCK