What happens if it rains after spraying the olive trees? This is a question that many farmers and gardening enthusiasts ask themselves, especially when the weather seems unpredictable. The answer is not simple, as it depends on several factors such as the type of products used, the time it takes for rain to fall after application, and the specific conditions of the crop.
In this article we are going to explore in detail everything you need to know about the relationship between phytosanitary treatments and rain. From the effect of precipitation to the key recommendations To maximize the effectiveness of the products, here you will find all the information based on comprehensive analyzes and best agricultural practices.
Absorption time, a key factor
The effectiveness of the pesticides is directly related to its absorption time. According to various experts, as detailed in multiple sources, most chemicals require between 2 and 4 hours to be adequately absorbed by the plant. This means that if it rains before this interval, you are likely to lose a large part of the effort invested.
Some products like foliar fertilizers or organic stimulants have better resistance to rain, especially if they are formulated with adjuvants that improve their fixation in plant tissues. On the other hand, products known as mesostemic y systemic They have greater penetration capacity and resistance to washing by rain.
Phytosanitary products and their classification against rain
Phytosanitary products can be classified according to their ability to remain in the plant and their sensitivity to rainfall:
- Non-systemic or topical: They remain on the surface of the leaves and are highly vulnerable to rain.
- Mesostemic: They partially penetrate the leaf but have limited translocation to other parts of the plant, being more resistant than non-systemic ones.
- Systemic: They are completely absorbed and distributed throughout the plant, offering greater durability and effective even if it rains a few hours after application.
As regards specific fungicides for olive trees, such as treatments against olive leaf spot, the use of products based on copper compounds and those with advanced formulations designed to better resist rain.
Tips to avoid loss of effectiveness
Wondering how to maximize treatment results in rainy conditions? Pay attention to these tips key recommendations:
- Choose the right moment: Avoid spraying if the forecast predicts rain in the next 4 hours. It is preferable to apply the treatment early in the morning or late in the afternoon to minimize the risk of evaporation and washing.
- Use adjuvants: These additives improve the adhesion of the product to the leaves and enhance its absorption.
- Assess the amount of rainfall: If rainfall is less than 10 mm, the treatment is unlikely to lose effectiveness. Otherwise, consider a new treatment.
- Check the product label: Check the recommended absorption time and its resistance to rain.
Application of foliar treatments in olive trees
Image - Wikimedia / H. Zell
La application of foliar fertilizers en olives must combine adequate nutrients with organic stimulants, such as amino acids or humic substances, to facilitate their absorption. However, it is essential to balance the nutrition of the farm, since Overuse of stimulants can damage the soil in the long term.
Make sure that foliar treatments are complementary to soil fertilization practices. If the crop has available fertigation or adequate fertilizers, foliar treatments act as an additional reinforcement in their development.
What to do after the rain
If it rains after spraying, evaluate the situation before repeating the treatment. Observe the crops during the following days and check if the effect of the products was adequate. In case of heavy rain, you can consider a new application, especially if it was contact products.
Also, remember that repeated use of the same fungicide can cause resistances in plants. Alternate products with different modes of action to avoid this problem.
Specific treatments to prevent repilo
Image - Innovagri.es
El olive leaf spot It is a common disease caused by the fungus Fusicladium oleagineum. After the rain, the humid conditions and mild temperatures facilitate its development. Therefore, it is recommended to carry out preventive treatments with copper-based fungicides, such as copper oxychloride or hydroxide. It is essential to wet the entire plant well. leaf mass, paying special attention to the lower and inner areas of the tree.
Likewise, cultural practices as pruning that improves ventilation inside the olive tree helps prevent the disease naturally.
The key to effectively addressing the interaction between phytosanitary treatment and rainfall lies in the planning. Carefully evaluate the weather conditions and the type of product used to ensure that the effort translates into positive results.