What's on these gum leaves? скачать в хорошем качестве

What's on these gum leaves?

Many insects feed on and breed in the leaves of gum trees. This video looks at the insects which create sugary lerps on gum leaves. The insects are known as psyllids (pronounced with a silent 'p') of the family Psyllidae. Psyllids are sap-suckers and they suck sap from gum tree leaves, and excrete the excess plant sugars as honeydew. This is visible as a shiny sticky substance on gum tree leaves. Psyllid infestation can cause leaves to show necrosis, and heavy infestations may cause defoliation of trees. Naturally occurring parasites and predators will eventually get on top of a serious psyllid infestation, but that doesn't happen overseas where the parasites do not occur naturally. Link to my other video about psyllids and parasitic wasps:    • Psyllids, lerps, and a parasitic wasp   If you like this video please give it a thumbs up, and subscribe to the channel if you haven't already done so. MY BOOKS: "Garden Pests, Diseases & Good Bugs" ▶ https://bit.ly/3wELyCy ▶ https://bit.ly/2TnuBrM ▶ https://bit.ly/2DO0cNR "Backyard Insects" ▶ https://bit.ly/3n8ha0n ▶ https://amzn.to/30iF8wD FOLLOW ME: Instagram ▶  / denis_crawford   Facebook ▶  / denis.j.crawford   VISIT MY BLOG: ▶http://www.oneminutebugs.com.au