Disease control is a crucial task in the planting of fruit trees. Among them, the selection and application of fungicides directly affect the growth status and fruit quality of fruit trees. The selection of fruit tree fungicides involves multiple considerations, including but not limited to core factors such as disease type, fruit tree species, fungicide active ingredients, environmental conditions, and pesticide residues.
First of all, for different types of fruit tree diseases, choosing the right fungicide is the key. For example, thiophanate-methyl and carbendazim, two fungicides with strong broad-spectrum properties, are mainly suitable for the prevention and control of common fruit tree diseases such as anthracnose, brown rot, and scab. By inhibiting the growth and reproduction of pathogenic bacteria, they can effectively prevent the spread of diseases and protect the health of fruit trees.
Secondly, mancozeb, as a protective fungicide, plays an important role in the prevention and control of fruit tree diseases. Its pharmacodynamic mechanism is mainly to prevent the invasion of pathogens by forming a protective film on the surface of the plant body, and is widely used in the prevention of scab, spotted defoliation, scab and other fruit tree diseases.
In addition, difenoconazole, azoxystrobin, tebuconazole, flusilazole, propiconazole and other systemic fungicides have stronger penetration and transmissibility, can be absorbed by fruit trees and distributed in the body, and have a good effect on powdery mildew, rust, black pox, scab, brown spot and other stubborn diseases.
In recent years, with the improvement of environmental awareness and the development of sustainable agriculture, biocides such as Bacillus subtilis and Trichoderma have gradually been favored by fruit farmers because of their pollution-free, non-residue and non-resistant characteristics. These biologics inhibit or kill pathogenic microorganisms by competing, antagonizing, or inducing the plant's own defense mechanisms.
In general, the selection of the "best" fruit tree fungicide is not based solely on the brand or name, but also on the specific situation of the orchard. This includes analysing the climatic conditions of the orchard, the growth stage of the fruit trees and the types of diseases they are prone to, while strictly adhering to the regulations on the use of pesticides and safety intervals, and using a variety of fungicides in a reasonable manner. In addition, we should advocate a comprehensive control strategy, that is, while relying on chemical pesticides, we should also pay attention to the use of biological control, physical control, agricultural control and other means to achieve comprehensive, lasting and efficient control of fruit tree diseases, so as to ensure the sustainable and healthy development of the fruit tree industry and the food safety of consumers.