This document is a product technical note from Jiangsu Lanfeng Crop Science Co., Ltd., compiled based on the company's pesticide registration certificate information. It is intended for learning and reference by growers and channel partners and does not serve as an independent basis for field pesticide application. As climate, soil conditions, and crop growth status vary by region, actual pesticide use should follow the product label and local agronomic guidance.
Product Family: Dafusheng (Carbendazim Series, 4 Registered Specifications)
Registration No.: Carbendazim 40% SC (PD86134-3), Carbendazim 50% WP (PD85150-8), Carbendazim 25% WP (PD84118-6), Carbendazim 500 g/L SC (PD20080333)
Chemical class: Benzimidazole systemic fungicide (FRAC Group 1)
Key characteristics: strong systemic activity, broad spectrum, affordable price, effective against a wide range of diseases caused by higher fungi, and possessing both protective and curative effects.
Field Positioning: As a long-established "all-purpose" fungicide on grain crops, fruit trees, and vegetables, carbendazim is one of the most familiar fungicidal active ingredients to growers. The four formulations of Dafusheng cover high, medium, and low concentrations, as well as two formulation types—suspension concentrate and wettable powder—allowing selection based on specific application scenarios.
Carbendazim is a representative benzimidazole fungicide that has been widely used in China since the 1980s, making it one of the most familiar fungicide active ingredients to several generations of agrochemical professionals. It possesses strong systemic activity, being absorbed by crop roots, stems, and leaves and translocated acropetally, thereby providing both protective activity before pathogen invasion and inhibitory effects on lesion expansion during the early stages of disease development.
Dafusheng has developed carbendazim in four specifications: for those seeking high content, good suspension, and storage stability, the 40% SC or 500 g/L SC is recommended; for those accustomed to powders or sensitive to cost, the 50% or 25% WP is available; and for seed dressing to prevent seedling diseases, both the 25% and 50% powders are registered. One brand, from foliar spraying to seed treatment, from fruit trees to rice, covers all scenarios.
⚠️ Key Reminder: After decades of use of carbendazim, resistance has developed in pathogenic fungi in some regions, particularly in areas with high incidence of gray mold and Sclerotinia diseases. It is essential to rotate with fungicides of different modes of action.
Professional Principles
Carbendazim inhibits the formation of tubulin during mitotic division in fungal cells, preventing the normal assembly of the spindle apparatus and thereby blocking fungal cell division and growth. It belongs to FRAC Group 1 (benzimidazoles). Carbendazim exhibits excellent systemic translaminar activity, being absorbed by crops and translocated acropetally, exerting both protective and curative effects.
Here is the professional English translation of the provided Chinese paragraph: --- **Plain-Language Explanation** A plain-language explanation refers to the use of simple, everyday vocabulary and sentence structures to convey the meaning of a concept or term in a way that is easily understood by non-specialist audiences. It avoids technical jargon, complex terminology, and overly formal phrasing, instead prioritizing clarity and accessibility. The goal is to ensure that the core idea is communicated effectively to a broad readership, including those without specialized background knowledge in the relevant field.
Carbendazim effectively cuts off the power supply to the pathogen's "division workshop"—for fungal cells to reproduce, they must first complete cell division, which relies on the "scaffold" assembled from tubulin proteins. Carbendazim dismantles this scaffold, rendering the pathogen incapable of reproduction. When the spray solution is applied, a portion remains on the plant surface for protective action, while another portion is absorbed by the crop, providing systemic protection from the inside out.
🌱 Registered Applicable Scenarios (by Specification)
1. Dafusheng 40% Carbendazim Suspension Concentrate (PD86134-3): Spray at 400–800× dilution for fruit tree diseases, 1600× dilution for rice sheath blight, 188–250 g/mu for oilseed rape Sclerotinia stem rot, 125 g/mu for peanut damping-off, 1600× dilution for wheat and barley Fusarium head blight, and 250–500× dilution for sugar beet leaf spot; for cotton seedling diseases, soak seeds at 133× dilution.
2. Dafusheng 50% Carbendazim Wettable Powder (PD85150-8): For ginseng rust rot, apply 5–10 g/m² as soil drench; for fruit tree diseases, spray at 500–1000× dilution; for cotton seedling diseases, mix seed at a ratio of 1:100.
3. Dafusheng 25% Carbendazim Wettable Powder (PD84118-6): 250–500× dilution for fruit tree diseases; 200 g/mu as foliar spray for rice blast; seed dressing at a ratio of 1:50 for cotton seedling diseases.
4. Dafusheng 500 g/L Carbendazim Suspension Concentrate (PD20080333): Spray at 600–800× dilution for apple ring rot (Botryosphaeria canker).
🌾 Common Market Scenarios (Field practices beyond registered scope — please assess risks at your own discretion)
For wheat Fusarium head blight: 70-90 g/mu (40% SC); for apple ring rot: 800-1000× dilution; for apple anthracnose: 1000-1500× dilution; for tomato early blight: 60-70 g/mu; for lotus root leaf spot: 50-60 g/mu; for rice blast and rice sheath blight: 100 g/mu.
🍂 Scenarios Where Use Is Not Recommended
In areas with severe occurrence of gray mold and Sclerotinia rot, continuous single-agent application — high resistance risk, with efficacy declining year by year.
When mixed with alkaline agents, carbendazim is prone to decomposition under alkaline conditions.
Registered Specifications: All four specifications in the Dafusheng series are officially registered, with complete registration certificate numbers and clearly labeled product tags.
Product properties: The suspension concentrate is uniform and fine after shaking, with no hard lumps; the wettable powder is dry and loose, with no caking.
Dilution stability: After mixing with water and stirring, a stable suspension is formed, and no significant sedimentation or stratification occurs upon standing.
Packaging Qualification: Complete "Three Certificates" for pesticides (Registration Certificate, Production License, and Product Standard Number).
Avoid mixing with strongly alkaline agents (e.g., Bordeaux mixture, lime sulfur), as carbendazim is prone to decomposition and loss of efficacy in alkaline conditions.
Compatible with most insecticides and foliar fertilizers for tank-mixing and immediate application; however, a small-scale trial is recommended prior to full-scale use.
Do not rely solely on carbendazim in fields where resistance has already developed (e.g., greenhouses with多年 continuous cropping and gray mold outbreaks) — once resistance is established, increasing the dosage will not help.
Don't place an order just because the label says "carbendazim"—always verify the registration certificate number, as only regulated products offer reliable assurance.
Do not overlook rotation—rotating with fungicides of different mechanisms of action, such as triazoles (epoxiconazole) and dicarboximides (iprodione), is key to extending the service life of carbendazim.
Carbendazim Resistance Management: Carbendazim is classified as a high-resistance-risk fungicide. After years of continuous use as a single agent, resistance in *Botrytis cinerea* and *Sclerotinia* pathogens has become widespread. Rotation strategy: use mancozeb-type protectant fungicides during the early stage, apply carbendazim at the initial stage of disease onset, and switch to diethofencarb mixtures (Lanfeng Jinwanmeiling) or iprodione (Lanfeng Meiying) in areas where resistance has developed.
Combination Package (Recommended by Lanfeng):
Wheat Fusarium Head Blight Program: Dafusheng 40% SC 70-90 g/mu + epoxiconazole-based product (Qiuzan 14-18 ml/mu), apply at heading to flowering stage when flowers are visible. The complementary modes of action between benzimidazole and triazole fungicides enhance control efficacy.
Rice Sheath Blight Program: Apply Dafusheng 40% SC at 1600-fold dilution, or 500 g/L SC at 100 g per mu, via foliar spray from the late tillering stage to before booting, in combination with field drying (mid-season drainage) for disease control.
Apple ring rot management program: Rotate Dafusheng 500 g/L SC at 600–800× dilution with Zoxium·Thiophanate-methyl (Lanfeng Qingliang at 1500–2500× dilution) to reduce selection pressure from a single active ingredient.
Dafusheng is the complete matrix of Lanfeng's carbendazim family: the 40% SC and 500 g/L SC lead with high concentration and high efficacy, while the 25% and 50% WP focus on cost-effectiveness. These four formulations cover disease control and seed dressing at the seedling stage for major crops including fruit trees, rice, wheat, cotton, peanut, and rapeseed. Key application points: select the formulation according to the scenario, avoid mixing with alkaline agents, rotate with products of different modes of action, and prioritize combination products in areas with severe disease pressure.
As a professional agricultural plant protection translator, here is the English translation of the given Chinese paragraph: Professional terminology definitions.
FRAC Group 1: Benzimidazole fungicides, which inhibit tubulin formation. Representative active ingredients include carbendazim, thiophanate-methyl, and benomyl.
Negative cross-resistance: A phenomenon in which a pathogen, after developing resistance to one fungicide, becomes more sensitive to another fungicide (e.g., benzimidazoles and diethofencarb).
Study and Exchange Notes
This series consists of product technical notes from Jiangsu Lanfeng Crop Science Co., Ltd. The content is compiled based on the company's registration certificate information and is subject to continuous refinement and updates. Growers and channel partners are welcome to provide feedback and corrections.
Carbendazim is a familiar active ingredient to growers and sells well through distribution channels, but precisely because of that familiarity, it is most prone to overuse and misuse. The four specifications of Dafusheng are not about registering more product codes, but about teaching retailers to match specifications to application scenarios: promote the 500 g/L suspension concentrate in orchard regions (good suspendability, stable in storage), the 40% suspension concentrate in field-crop regions (high cost-performance), and the powder formulation for seed treatment to returning customers. More importantly, we must emphasize rotation—carbendazim has been in use for decades, and making money in resistance-prone areas is no longer easy. Driving the adoption of rotation products such as Jinwan Meiling and Lanfeng Meiyin is where the sustainable business lies.
