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Symptom Identification and Control Methods of Red Pine Needle Cast
Red pine needle cast is a common disease worldwide. The disease can infect trees from young saplings to large trees, causing premature needle drop, affecting growth, and can lead to the decline and death of diseased plants. Symptoms: The disease usually affects 2-year-old needles, and some 1-year-old needles can also be affected. In the early stage of the disease, very small yellow spots or segmental spots appear on infected needles, and by late autumn the entire needle turns yellow and falls off. In the spring of the following year, larger, black or gray, long oval or oval raised granular dots appear on infected needles, with a paint-like luster and a longitudinal crack in the center, which are the ascocarps of the pathogen. Some diseased needles
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Natural color-enhancing feeds for laying hens include pine needles, black locust leaves and mugwort leaves
Pine needle powder: made by air-drying and grinding pine needles. Generally, adding 3 percent to 5 percent to the feed gives a good color-enhancing effect, and can increase the egg production rate by 13 percent. Black locust leaf powder: the added amount of black locust leaf powder accounts for 5 percent of the feed, and the effect is better than pine needles; the yolk color can be raised from grade 1 to grade 9 and can remain stable without changing. Mugwort leaf powder: mugwort leaves contain nutrients such as fat, protein and various amino acids. Adding 2 percent to 3 percent mugwort leaf powder to the chicken diet can increase egg production by 12 percent to
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