Romeo is the first biofungicide registered in Spain based on Cerevisane, a low-risk substance authorized for use in the European Union. It is an inducer of the biological resistance of plants, free of MRLs and authorized for use in organic farming.
The research by large companies that focus on the health of crops has paid off. Cerevisane, an active substance of Romeo, is the cell wall of the Saccharomyces cerevisiae yeast which is present in nature, without being associated with any pathogen, and is commonly used in human nutrition and naturally breaks down into various usable elements by other living organisms.
Cerevisane is composed of chitin, mannan, glucans and relative polymers (sugars and proteins), in common with pathogenic fungi. After its application, a plant responds as if attacked by a pathogen, effectively activating its internal defense systems.
The mode of action of Romeo is based on the endogenous defense of plants, having evaluated the overexpression of different genes after application, which results in the reinforcement of cellular structural systems (thickening of lignin), segregation of natural fungicidal compounds (phytoalexins and PR proteins) and in the acceleration of the oxidative metabolism of the plant (peroxides, flavonoids).
Romeo stimulates both the salicylic acid and jasmonic acid and ethylene pathways, demonstrating a broad spectrum of action against biotrophic (mildew, powdery mildew) and necrotrophic (botritis) fungi.
Endogenous defense systems depend on each species, as well as on each variety. The ability of each species to react to a pathogen, and the speed with which this response occurs, is related to the resistance of the plant. The response of the plant to the application of Romeo is very fast.
At two hours, the immune defense is already active at 60%, obtaining its maximum response between 24 and 48 hours after treatment.
Romeo is authorized for use on the vine, acting as an inducer of the plant's natural defenses against powdery mildew, mildew and botrytis. It is also authorized for use in tomato, eggplant and cucurbitaceae, strawberry and lettuce.
Romeo should be applied on the vine at 250 grams per hectare, always preventively, ensuring good crop cover.
After the application, the plants’ defenses remain active for a duration of 7 days, and treatment can be repeated after that period. To obtain the best response from the plant, it is recommended to apply Romeo in blocks of two to three consecutive applications, and fourteen day breaks between blocks.
An ecological alternative
For adequate protection of the crop against mildew and powdery mildew, Romeo can be applied in programs combined with copper, sulfur or other synthetic products, so that their effect is enhanced.
In the case of botrytis, Romeo can be applied alone on farms with ecological management, or establish a program with the antibiotic Prolectus, ensuring total cluster protection before harvest. It has also been shown that Romeo's joint applications with Bond adjuvant reinforce the effectiveness of the product.
The wide variety of substances produced by the plant after the application of Romeo makes it a very versatile tool for crop defense. Romeo allows the plant to build its own set of physical and biochemical defenses, in anticipation of response times, thus obtaining a valid preventive response to reduce susceptibility to pathogens.
The joint action within a program of resistance inductors such as Romeo and fungicidal products is an appropriate strategy for the proper integrated and sustainable management of crops, helping to meet the current requirements and concerns of society.
With this new launch, Kenogard maintains its commitment to sustainable agriculture, offering a complete catalog of both natural and synthetic tools to help the farmer with optimal management of their farms.