UMass Extension Landscape Message June 3, 2011

claireplymouth z6b coastal MAJune 3, 2011

UMass Extension Landscape Message June 3, 2011

"Winter Moth (WM) caterpillars have virtually finished feeding in MA at this time and have entered into the soil to begin pupation. No more damage will occur from this pest this year. Trees that were attacked by this pest should be considered to be stressed trees, especially if defoliated, and should be watered once a week during dry periods for the rest of the growing season. Fertilizer is not necessary nor is it recommended.

Lily Leaf Beetle eggs are maturing on the undersides of Asiatic lily foliage. These are tan at first but then turn orange and eventually a bright red just prior to hatching. Inspect now for the beetles and the presence of eggs. When occurring in small numbers, both eggs and adult beetles can be removed by hand and destroyed. If treatments are necessary a chemical pesticide, such as a pyrethroid, organo-phosphate, or carbamate, is usually required to obtain desired levels of control for the adult beetles. The larvae, which will appear soon, are easily treated with a product that contains Spinosad (e.g. Conserve SC)."


Thank you for reporting this comment. Undo

As I read this about winter moth damage - I'm wondering how I would water my maple tree. The tree is 50-60 feet tall, and the trunk is at least 2 feet in diameter. I have 5 trees this size.

Also, I wish the researchers would come up with a pesticide that could be applied to the ground under the tree since the caterpillars have now entered the soil to begin pupation. I wonder if grub x would work?

    Bookmark   June 3, 2011 at 5:46PM
Sign Up to comment
More Discussions
Cold or not, it's THAT time of year again!
The infamous Philadelphia International Flower Show is...
Birds and other mobile features in the garden 2015 #2
This thread is intended to give people a place to post...
claireplymouth z6b coastal MA
How are you guys holding up in this "Snowpocalypse"??
Hi guys, haven't been posting much, but still lurk...
Show Us Your Gardens - A Photo Thread -February 2015
Happy Snow Days New England Gardeners! Welcome to the...
2015 Camellia Show at Tower Hill Botanic Garden This weekend,...
claireplymouth z6b coastal MA
© 2015 Houzz Inc. Houzz® The new way to design your home™