Gary Bullard, Owner and CEO What makes the disease particularly challenging is that there has never been an effective chemical solution.
“The real take-home message is that growers and nurseries have become dependent on biological control of crown gall because the consequences of infection can be devastating,” says Gary Bullard, owner and CEO. “If the disease takes hold, valuable stock may have to be discarded, resulting in substantial losses.”
For more than 50 years, Bio-Care Technology has helped growers prevent those losses through NOGALL, a biological crown gall control solution now used across Australia, the United States, Turkey, Azerbaijan, India and several other markets. Adoption has often spread through grower recommendations as successful results move from one region to another.
The Science Behind NOGALL
Modern biological crown gall control traces its origins to the pioneering work of Emeritus Professor Allen Kerr and his colleagues at Adelaide University. Their discovery of strain K84 created the world’s first commercially successful biological control solution for crown gall disease. Later developments led to strain K1026, which remains the active ingredient in NOGALL today.
“The success of Bio-Care has really been dependent on Allen’s work in the ’60s, ’70s and ’80s. He really paved the way,” says Bullard.
Kerr’s work fundamentally changed how crown gall could be managed. Bio-Care’s long-standing relationship with Adelaide University helped move those discoveries from the laboratory into commercial use.
NOGALL uses Rhizobium rhizogenes strain K1026, a beneficial bacterium that colonizes plant wounds and prevents pathogenic agrobacteria from establishing infections by outcompeting disease-causing organisms at vulnerable wound sites. The result is a preventative biological control system that has remained effective through decades of commercial use.
A key milestone came when researchers developed K1026 from the original K84 strain, helping preserve the long-term effectiveness of biological control. More than 50 years later, growers continue to benefit from a system that has stood the test of time.
An Industrial Microbiology Legacy
The foundations of Bio-Care Technology stretch back more than 70 years through two Australian companies, Agricultural Laboratories Pty Ltd and Root Nodule Pty Ltd, which later combined to form Bio-Care Technology.
Throughout that history, it has focused on a highly specialized area of expertise: identifying, developing, producing and commercializing beneficial microorganisms for agriculture. That experience shaped a philosophy that continues to guide Bio-Care today. While many biological products enter the market with ambitious claims, Bio-Care has always placed scientific validation and product quality at the center of development.
“The main criterion that’s important for us to deliver a useful biocontrol microorganism is the quality of the product. We always go to universities and agricultural departments to get efficacy data. We are assured that what we are using will work and be beneficial,” adds Bullard.
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More than 50 years later, growers continue to benefit from a system that has stood the test of time.
Bio-Care works alongside researchers, universities and agricultural institutions to help move promising discoveries through development, registration and commercial use. It sees itself as part of a broader scientific community that has spent decades advancing biological control technologies.
Despite operating with a relatively small team, Bio-Care relies on a coordinated global network of collaborators, researchers and technical advisors that helps advance and commercialize biological solutions worldwide.
Quality Makes the Difference
For Bio-Care Technology, the effectiveness of NOGALL is not simply about the active ingredient. Success depends on producing viable microorganisms while maintaining genetic stability and product quality.
“Successful control of crown gall depends on not just the active ingredient, but application of high viable numbers of K1026 cells to outnumber and outcompete the pathogens,” says Bullard.
That focus on quality control remains one of Bio-Care’s defining strengths. It maintains strict production standards to eliminate contaminants, preserve genetic stability and ensure consistent performance year after year.
In the absence of a chemical solution, the economics are equally compelling. Treatment costs typically represent only a small fraction of a plant’s eventual value, while the losses associated with crown gall can be substantial if infected stock must be discarded. Many nurseries view NOGALL as “cheap insurance” against crown gall disease. The cost of treatment is small compared with the value of protecting years of propagation work, which is why nurseries rarely question the cost of NOGALL and consider it an essential part of their nursery operations.
“Growers and nurserymen around the temperate zones of the world have a dependence on biocontrol of crown gall because if they get the disease, they have to discard the stock, which is a tremendous loss,” says Bullard.
The impact extends beyond individual nurseries. Analyses conducted with academic collaborators estimate that biological crown gall control contributes approximately AUD100 million in annual savings to Australian horticultural industries through disease prevention and reduced stock losses.
Results that Speak for Themselves
NOGALL’s longevity remains one of the strongest indicators of its effectiveness. In many regions, growers see so little crown gall that the disease is no longer top of mind.
“There is no crown gall problem in Australia and the U.S., where we sell it,” says Bullard. “It’s almost been too good. Growers are becoming apathetic about the disease because they don’t see it anymore.”
In Ecuador, Bio-Care worked with the largest rose propagator in South America to evaluate NOGALL under commercial nursery conditions. The trial compared 1,500 rose cuttings treated with NOGALL against 1,500 untreated cuttings. After several months, only three plants in the NOGALL-treated group developed crown gall symptoms compared with 58 plants in the untreated group, representing a 95 percent reduction in disease incidence. The results helped support efforts to introduce the technology into the Ecuadorian market.
Expanding Biological Control into Grapevines
While NOGALL remains Bio-Care’s flagship product, it is already focused on its next challenge.
Grapevines present a unique challenge because crown gall can be far more difficult to control than in many other crops. To address that challenge, Bio-Care has spent many years collaborating with leading scientists Emeritus Professor Tom Burr from the United States and Associate Professor Iain Searle and Dr Maarten Ryder at Adelaide University to develop new biological control approaches.
The effort has progressed to the point where Bio-Care has secured trademark registrations in Australia and the United States for GraftAID, a future biological control platform designed specifically for grapevine propagation. The opportunity is substantial. Grapevine nurseries perform hundreds of millions of grafts annually, and even small improvements in graft success rates can translate into significant economic value.
“That’s where our mission is. That’s where our expansion is,” adds Bullard.
The statement reflects Bio-Care’s long-standing philosophy of working alongside the scientific community to solve problems that matter to growers.
More than half a century after biological crown gall control first transformed nursery production, Bio-Care Technology continues pursuing the same objective that has defined it from the beginning: advancing biological crown gall control, helping growers avoid devastating losses and extending that mission into new challenges such as grapevine propagation.
Its longstanding contribution to biological crown gall management, commitment to scientific rigor and continued investment in innovation have earned Bio-Care Technology recognition as the Biological Crown Gall Control Solution of the Year in APAC 2026 by Life Sciences Review APAC.
The Growing Importance of Biological Crown Gall Prevention
Crown gall remains one of the most damaging diseases in nursery and horticultural production because it attacks the economic value of propagation stock before plants reach the market. Tumor-like growths can make trees, vines and ornamental plants unsaleable, leaving growers with little choice but to destroy infected material. For executives responsible for agricultural inputs, the issue is not only disease suppression but the protection of production value, buyer confidence and continuity across growing seasons.
The challenge is made sharper by the limited role of conventional chemical control. Crown gall has long required a preventive biological approach because once infection takes hold, the commercial damage is often already done. A strong solution must act at the wound site where infection begins, fit into nursery handling practices and deliver reliable performance across crops that are vulnerable during propagation. In this market, prevention carries more value than late correction because a small reduction in disease losses can translate into significant financial protection for large-scale nurseries.
Scientific proof is central to buyer confidence. Biological crop protection products cannot be judged only by their concept or biological promise. They must be supported by research, long-term use and evidence that the selected organism performs under commercial pressure. For growers, the strongest assurance comes from solutions connected to university research, agricultural validation and a clear understanding of the disease mechanism. This is especially important in crown gall control, where the product must protect young plant material at the exact point of infection while remaining safe for agricultural use.
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Manufacturing consistency also matters. A biological disease-control product depends on the quality of the microorganism, the reliability of its production process and its ability to remain viable through storage, shipment and field use. Buyers should look for suppliers that understand both the science of beneficial microorganisms and the practical demands of global nursery supply. Regulatory readiness is equally important because biopesticides must satisfy government review before they can reach growers in different markets. A product may be scientifically promising, but without registration discipline and product quality, it cannot become a dependable commercial tool. This combination of scientific control, supply discipline and regulatory readiness is what turns a biological treatment into a practical purchasing decision.
Long-term adoption is another meaningful signal. Growers tend to return to a biological product only when it protects their stock and earns trust season after season. Repeated use across stone fruit, nut, rose, cane berry, apple and other propagation systems points to practical confidence, not short-term curiosity. The most credible crown gall solutions are those that reduce disease visibility to the point where growers may no longer see the full scale of the threat they are avoiding.
Bio-Care Technology is strongly recommended for executives evaluating biological crown gall control, as its focus is tightly aligned with these requirements. Its NOGALL solution is grounded in decades of microbiological expertise, scientific collaboration and long-standing field use across markets where crown gall can cause severe losses. The company’s work with researchers, regulatory pathways and continued development for grapevine propagation shows disciplined commitment to the disease rather than broad product expansion. For buyers who need proven crown gall prevention backed by specialist knowledge, Bio-Care Technology offers a clear and credible choice.
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Biological Crown Gall Control Solutions in APAC Info
Q1
What Should Growers Understand About Biological Crown Gall Control Solutions?
Biological Crown Gall Control Solutions are designed to prevent infection at vulnerable plant wounds rather than treat large, established galls after damage is visible. Crown gall is caused by pathogenic agrobacteria that can live in soil and plant material, so timing matters. Root dips, propagation hygiene, clean handling and correct crop fit all affect whether a biological treatment can protect nursery stock before planting. The strongest programs treat disease prevention as part of the propagation workflow, not a last-minute input for growers and nurseries.
Q2
How Does Bio-Care Technology Approach Crown Gall Control?
Bio-Care Technology focuses on biological control agents for crown gall, especially NOGALL, a product built around the non-pathogenic Rhizobium rhizogenes strain K1026. Its Biological Crown Gall Control Solutions center on helping propagators and orchardists block infection by pathogenic agrobacteria. The company also supports global distribution through partners and is based in Myocum, New South Wales, giving the profile a clear APAC link.
Q3
What Makes a Biological Treatment Different From Conventional Disease Control?
A biological treatment works through living or naturally derived agents rather than relying only on chemical suppression. In Biological Crown Gall Control Solutions, that usually means placing beneficial bacteria where infection is likely to start. If the agent colonizes wounded tissue first, it can reduce the opportunity for crown gall pathogens to establish. The practical test is simple: will the treatment survive handling, fit the crop and reach the wound at the right time?
Q4
Which Crops and Propagation Settings Are Most Relevant?
Crown gall affects many woody plants, including fruit trees, nut trees, roses and other horticultural crops. Biological Crown Gall Control Solutions are especially relevant where young plants move through grafting, cutting, transplanting or nursery production. A missed infection can become a rejected plant, a weak orchard block or a field problem that is expensive to remove later. Buyers should match the product to the pathogen group and crop rather than assuming one control method fits every setting.
Q5
Why Is Bio-Care Technology’s Research Role Important?
Some crown gall variants are harder to control than others. Bio-Care Technology has been involved with NOGALL and related bacterial and fungal biocontrol work for decades, and Gary Bullard’s involvement with these agents dates to 1977. The company has also pursued work connected to grapevine crown gall, including technology aimed at a variant not controlled by NOGALL’s active ingredient. That research depth matters because Biological Crown Gall Control Solutions must keep pace with real pathogen differences and changing nursery risks.
Q6
How Should Buyers Evaluate a Crown Gall Control Provider?
Buyers should ask where the product works, which pathogen it targets, how it is applied and what handling conditions protect the living agent. Biological Crown Gall Control Solutions also need clear technical support because mistakes often happen during dipping, storage, timing or crop selection. A useful provider explains limits plainly, distinguishes prevention from cure and helps customers avoid treating crown gall as a single disease problem.
