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LALCIDE CHONDRO (Registration Number 29293 PCP) has Chondrostereum purpureum, a naturally occurring fungal plant pathogen, as its active ingredient. LALCIDE CHONDRO is currently registered as a biological herbicide for the inhibition of re-sprouting and regrowth from cut stumps of alders (red, thin leaf, and Sitka), trembling aspen, red oak, ironwood, white birch, sugar maple, and choke cherry, in rights-of way, for forest vegetation management and from cut and girdled stumps of glossy and European buckthorn.

How It Works:

Chondrostereum purpureum is a hemibiotroph that infects living tissue, eventually killing it, and continues to develop (including sporulation) on the dead tissue in competition with saprotrophs.

Chondrostereum purpureum releases an enzyme which disrupts the middle lamella between the epidermal cells and palisade cells of the leaves causing the two layers to separate. The change in cell arrangement results in a change of reflectivity of the leaf and is also called silver leaf disease. This will control and inhibit stump sprouts post harvest.

It is a biological solution that provides a more environmentally sensitive option to vegetation managers who may be limited in the use of chemical herbicides.

Related Pest & Pathogens

  • Active ingredient: Chondrostereum purpureum Strain PFC2139 1×105 to 1×107 Colony Forming Units per Kg
  • Formulation: Paste
  • Chondrostereum purpureum is a naturally occurring wood decay fungi which can colonize freshly cut stumps and wounds. The fungus can infect living tissue and continue to develop on the dead tissue.
  • Chondrostereum purpureum causes silver leaf disease in foliage of sprouts which result post cutting or girdling. The Cp releases an enzyme which disrupts the middle lamella between the epidermal cells and palisade cells of the leaves, causing the two layers to separate. The change in cell arrangement results in a change of reflectivity of the leaf, resulting in a silvered appearance. This will control and inhibit stump sprouts post harvest.
  • LALCIDE CHONDRO is a biological herbicide.
  • It is a biological solution that provides a more environmentally sensitive option to vegetation managers who may be limited in the use of chemical herbicides.
  • 1L bottles.
  • Bottles will come with an application nozzle which once perforated can be used for direct application.
  • Product is applied manually though the 1L squeeze bottle. The bottle nozzle needs to be cut to create an opening of approximately 5mm to allow the LALCIDE CHONDRO to flow through.
  • Shake well prior to use.
  • Product is applied directly to the stump top or girdling wound:
    • Application to stump top:
      • Stump height should be kept low (around 10cm if possible) in order to minimize the distance required for Chondrostereum purpureum to travel to colonize the stump.
      • Apply a single layer of LALCIDE CHONDRO to freshly cut stumps.
      • For stumps less than 6cm in diameter: cover entire cut surface area.
      • For stumps greater than 6cm diameter: apply a wide band covering an outer ring of the cut surface, including bark, cambium, and sapwood. Ensure complete coverage of the circumference of the stump surface.
      • Buckthorn often grows in multi-stem groups: all cut stems require treatment.
    • Application to a girdling wound:
      • Girdle buckthorn stems completely, leaving no intact cambium. Incomplete girdling can result in reduced efficacy.
      • Girdling band should be 3cm wide and kept low on the stem (approximately 10cm).
      • Using a paintbrush, apply LALCIDE CHONDRO to entire exposed girdled surface.
      • For multi-stems, care must be taken to ensure all stems are completely girdled. Often stems can be fused together which could leave intact tissue. In this case, consider girdling slightly higher, or cutting one or more stems before treating the cut surface directly, in order to free up the other stems for complete girdling.
    • Entire contents of the bottle must be used on the same day it is opened.
  • LALCIDE CHONDRO should be applied in late spring to early summer when buckthorn is fully leafed out. Typically mid-June to early July, but can also be dependent on geographical location and growing degree days.
  • A thin layer of product should be applied to a freshly cut stump or girdle wound within 30 minutes of cutting.
  • LALCIDE CHONDRO only requires one application per stem.
  • LALCIDE CHONDRO should be applied within 30 minutes of cutting or girdling.
  • Conditions should be conducive for fungal growth and infection which includes some shading from direct sun:
    • If operations for control include cutting stumps, it is recommended to have an overstory species present that provides some shade to allow for incubation and colonization of the LALCIDE CHONDRO.
    • If operations for control include girdling stems, then the buckthorn canopies of the girdled stems can provide shade to optimize fungal colonization. It is expected for canopies to remain alive for the rest of the growing season, post girdling.
  • It is BioForest’s recommendation to avoid applying in high temperatures (>30C) and to avoid direct sun exposure, if possible.
  • Do not apply if a heavy rainfall is forecasted within 48 hours of application. Heavy rainfall before the paste has a chance to dry (usually one to two days) may result in reduced suppression.
  • When handling, mixing and loading, or applying the product, applicators should wear long-sleeved shirts, long pants, closed toe shoes and socks, and water proof gloves.
  • Avoid direct contact with skin, eyes and clothing.
  • Chondrostereum purpureum is a naturally occurring microorganism found in forest ecosystems. The fungus is a plant parasite that can colonize freshly cut tree stumps in temperate forests to prevent re-sprouting.
  • When used as directed, there is minimal or negligible potential hazard to humans and non-target organisms (plants, insects, aquatic freshwater, estuarine and marine animals and wildlife), and minimal risk for ground and surface water contamination.

No. Do not mix LALCIDE CHONDRO with any chemical pesticides, including herbicides.

  • Product is applied manually though the 1L squeeze bottle. The bottle nozzle needs to be cut to create an opening of approximately 5mm to allow the LALCIDE CHONDRO to flow through.
  • Shake well prior to use.
  • Product is applied directly to the stump top or girdling wound:
    • Application to stump top:
      • Stump height should be kept low (around 10cm if possible) in order to minimize the distance required for Chondrostereum purpureum to travel to colonize the stump.
      • Apply a single layer of LALCIDE CHONDRO to freshly cut stumps.
      • For stumps less than 6cm in diameter: cover entire cut surface area.
      • For stumps greater than 6cm diameter: apply a wide band covering an outer ring of the cut surface, including bark, cambium, and sapwood. Ensure complete coverage of the circumference of the stump surface.
      • Buckthorn often grows in multi-stem groups: all cut stems require treatment.
    • Application to a girdling wound:
      • Girdle buckthorn stems completely, leaving no intact cambium. Incomplete girdling can result in reduced efficacy.
      • Girdling band should be at least 2.5cm wide and kept low on the stem (approximately 10cm).
      • Using a paintbrush, apply LALCIDE CHONDRO to entire exposed girdled surface.
      • For multi-stems, care must be taken to ensure all stems are completely girdled. Often stems can be fused together which could leave intact tissue. In this case, consider girdling slightly higher, or cutting one or more stems before treating the cut surface directly, in order to free up the other stems for complete girdling.
    • Entire contents of the bottle must be used on the same day it is opened.
LALCIDE CHONDRO Tech Sheet
LALCIDE CHONDRO Tech Sheet

Learn more about technical information about LALCIDE CHONDRO.

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