HOURS

Mon-Fri 9am-9pm
Sat 9am-5pm
Sun 10am-5pm
   
   

Insect Pests on Evergreens

Pine False Webworm
Pine Needle Scale

Pine Tortoise Scale
Spruce Budworm
Spruce Gall Adelgid
Spruce Spidermite
Western Tussock Moth

White Pine Weevil 
Yellowhead Spruce Sawfly

 


 
 
 
 
 

 

 
 
 
 
 
 
Pine False Webworm

Plants Affected - Pine

Symptoms - Silken feeding tubes filled with needles, frass and cast skins.

Life Cycle:

  • Overwinter as larvae in soil beneath tree.
  • Adults emerge in spring, mate and female lays egg on last year’s needles.
  • Larvae hatch in 2 weeks, crawl to base of needle and feed.
  • Larvae create tubes along branch from within which they feed.
  • Feeding complete by late June when larvae drop to ground to overwinter.

Cultural Controls - Remove larvae by hand

Chemical Controls:

  • Malathion, Sevin applied as soon as larvae hatch (start spraying mid-May).
  • BTK

 

 

 
 
 
 
Pine Needle Scale

Plants Affected - White/Colorado Spruce, Scot’s/Lodgepole Pine, Douglas Fir and other Spruce.

Symptoms:

  • As scale feeds, yellow/green spots develop on needles.
  • Branches take on unhealthy grey appearance.
  • Scales are white, appear as flecks of white paint on needles.

Controls - Cultural or Non-chemical:

  • Lady beetles and wasp-like parasites offer some control.

Controls - Chemical:

  • Malathion or Sevin - apply shortly after new growth appears in early or Mid June.
    Can re-spray in early August before females form their hard shell.

Pine Tortoise Scale

Plants Affected - Mostly Scots, Jack and Austrian Pine

Symptoms:

  • Scales resemble tiny tortoises up to 1/4" long.  Appear on 1-2 year shoots
  • Severe infestations result in decreased plant vigor, yellowing, sooty mold from honeydew secreted by the insect

Life Cycle:

  • Immature females overwinter, resume growth in spring, mature in June.  Eggs are then laid beneath female, up to 500 each!

Controls - Cultural or Non-chemical:

  • Prune away damaged stems.

Controls - Chemical:

Malathion or Sevin - apply shortly after new growth appears in early or Mid June, when immature crawlers are active.


 

 

 
 
 
Spruce Budworm

Plants Affected - Spruce

Symptoms:

  • Lots of feces, webbing.
  • Notice particularly on new foliage on the upper third of the tree.
  • Insect has a brown/black head—so as not to confuse it with yellowheaded spruce sawfly. Young larvae are yellow green bodied, older cinnamon brown bodied.

Controls - Cultural or Non-chemical:

  • Handpick small infestations.
  • Have some natural predators.

Controls - Chemical:

  • BTK or Ambush – when larvae are young or first noticed and feeding.
  • Malathion or Sevin (note that Malathion will bleach blue needles).

 
 
 
 
 
 
Spruce Gall Adelgid

Plants Affected - Spruce, Douglas Fir

Symptoms:

  • Damage cosmetic.
  • Early spring white fluff may occur, followed by galls.
  • Damage is usually 8’ or lower.

Controls - Cultural or Non-chemical:

  • Hose down white fluff
  • Hand pick galls (green/purple ones still have adults inside).

Controls - Chemical:

  • None

 
 
 
 
 
 
Spruce Spidermite

Plants Affected - Spruce, pine

Symptoms:

  • Affects lower and center of tree.
  • Webbing - very fine.
  • Appears in hot, dry weather.

Controls - Cultural or Non-chemical:

  • Keep trees sprayed with water on a daily basis during hot dry spells.

Controls - Chemical:

  • Ambush
  • Malathion

 

 

 

 

 

 

Western Tussock Moth

Plants Affected - Many trees/evergreens.

Symptoms:

  • Needles are chewed, leaving little stubs.
  • Primarily feed on newer growth closer to tops of tree, then down.
  • Caterpillar is furry, two long black antennae and 4 distinct furry tufts on top of body. Brightly coloured spots.

Life Cycle - Overwinter as eggs, emerge in spring and start feeding. Mate, hundreds of eggs are laid and larvae stages feed heavily.

Biological Control - BTK

Chemical Control - Not required


 

 
 
 
 
 
 
White Pine Weevil

Plants Affected - White Pine

Symptoms:

  • Symptoms appear on most types of pine and sometimes spruce.
  • Terminal leader of pine and spruce become curled over resembling a shepherds hook.
  • Small exit and entry holes are seen at the base of the leader.

Controls - Cultural or Non-chemical:

  • Remove leader.
  • Trees must be kept healthy (well watered).

Controls - Chemical:

  • No regulated chemicals.

 
 
 
 
 
 
Yellowhead Spruce Sawfly

Plants Affected - Spruce

Symptoms:

  • Strong resin scent is noticed, needles are cut clean right to the branch
  • No webbing, feces as with spruce budworm

Controls - Cultural or Non-chemical:

  • If infestations small, hand pick.
  • Strong jet of water
  • Keep evergreens well watered (deep root watering).

Controls - Chemical:

  • Ambush
  • Malathion or Sevin (note that Malathion will bleach blue needles).