Pesticide control technology for apple scab:
The occurrence of apple scab is the most vulnerable to the opening of apple buds and the loss of petals. The lesions on the bracts are the best source of infection in the future. The cold and humid climate in early spring is conducive to the onset.
Apple scab prevention method: Spray the following agents during the occurrence of scab: 5% Tianan water 200 times solution, 65% sensible zinc wettable powder 600 times solution, 50% methyl thiophanate WP 1000 times solution 40% Fumei arsenic wettable powder 600-700 times liquid, etc., after several kinds of liquids need to add adhesive (6501 exhibiting agent) to improve the control effect.
Artworks are the crystallization of artists' intellectual labor. As a special commodity, it circulates in the art market. Like other commodities, it also has the basic attributes of ordinary commodities: use value and value; The difference is that the use value of works of art is embodied in the spiritual level rather than the material level. It aims to meet people's aesthetic and spiritual needs. Therefore, the use value of artworks is greatly affected by subjective factors.
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