The forest pansy (Cercis canadensis “Forest Pansy”) is a small japanese redbud selection that brightens up outside landscapes in U.S. Division of Agriculture plant hardiness zones 5 by 9. That includes showy clusters of purplish-pink blooms and heart-shaped, purplish-green leaves, this North American native makes a sexy flowering decorative tree for small yards and woodland gardens. Like different redbud tree varieties, the “Forest Pansy” is considerably inclined to a number of pest bugs and plant illnesses. (all ref 1)
The forest pansy redbud attracts varied foliage-feeding caterpillars, however the redhumped caterpillars (Schizura concinna) usually trigger essentially the most ugly injury. Mature caterpillars vary between 1 and 1 half inches in size and have pink heads and yellow our bodies with enlarged, vibrant pink, entrance stomach segments. The grownup feminine moths lay teams of white to creamy white eggs beneath the leaves. Newly hatched larvae feed collectively and skeletonize the undersides of leaves, whereas older caterpillars devour the remaining leaf tissue. These voracious feeders steadily defoliate whole branches on massive redbud timber and might utterly defoliate small timber. Luckily, wholesome redbuds usually recuperate and undergo no long-term injury.
Redbud timber often entice armored scale bugs, together with the oleander scale (Aspidiotus nerii) and the grasping scale (Hemiberlesia rapax). These tiny pests usually do not get any bigger than 1/eight inch in diameter and have uncommon, plate-like coverings. Scales steadily look much less like bugs and extra like bumpy, ugly lots on bark or leaves. That is as a result of these pests settle right into a feeding spot quickly after hatching and by no means transfer once more. Scales feed by inserting their slender mouthparts into plant tissue and sucking out the fluids. Feeding damage could cause leaves to yellow, wilt, curl and prematurely drop. Scale-infested bark would possibly crack and ooze a gummy liquid.
Consultants on the College of California Statewide Built-in Pest Administration Program do not suggest utilizing pesticides to tread redhumped caterpillars as a result of most gardeners merely spray too late for the chemical compounds to work. Prune out and destroy any foliage internet hosting redhumped caterpillars or small scale populations. Massive scale populations can usually be managed with a 2 % horticultural oil spray when you time the appliance to coincide with egg hatching. As soon as the scales settle into their feeding spots, they excrete a tough substance that covers their our bodies and protects them from chemical compounds.
Forest pansy redbud timber typically entice canker pathogens, significantly those who trigger Cytospora canker (Cytospora spp.). This fungal illness primarily happens on timber affected by environmental stress brought on by winter damage, drought, sunscald or pruning wounds. The pathogens develop into the interior wooden tissue, inflicting sunken, yellow, black or brownish-orange cankers to type on contaminated bark. Cankered branches usually bear wilted, brown or yellow foliage. Cankers typically girdle and kill branches and even whole redbud timber.
Verticillium wilt typically assaults and kills forest pansy redbuds. The soilborne fungal pathogens (Verticillium spp.) invade the tree’s roots and shortly unfold all through your complete vascular system. The fungal progress interferes with the switch of water and vitamins, which leads to fading, browning or yellowing leaves that defoliate early. Verticillium wilt infections usually assault one facet of the tree first after which unfold till your complete tree turns into contaminated and dies.
No chemical management exists to deal with canker or verticillium wilt as of Could 2013, so forestall fungal pathogens from attacking by maintaining your tree wholesome and vigorous. The forest pansy tolerates varied soil circumstances however requires a planting location with good drainage that receives full solar to partial shade. This redbud prefers constantly moist soils and must be watered every time the encircling soil feels dry to the contact. Throughout every irrigation session, give your tree about 10 gallons of water for every inch of the trunk’s diameter. Prune out diseased branches and foliage as quickly as you discover them, ensuring that you just minimize down into wholesome wooden tissue.