How to identify citrus yellow dragon disease
"Red nose fruit" or "green fruit (sweet orange)" or "green fruit (nanfeng tangerine)" or "non-mature fruit (guangdong sugar orange)": the fruit is not normally turned yellow during ripening, except near the handle Most of the others are blue. At present, the identification of Huanglongbing by fruit symptoms has become the main method for the judgment of Huanglongbing by fruit growers, and it is also the most accurate and fastest way to determine Huanglongbing disease. As long as the above symptoms are found in the trees, the entire tree is likely to have been infected with Huanglong disease.
Mottled yellow leaves are one of the main symptoms of citrus yellow dragon disease in the field, mainly from the base and edge of the leaves yellow, yellow and green, showing mottled.
Uniform yellowing or yellow shoots: Mainly new shoots do not turn green, with å´ç å´ç . 13. Steep ç—° South 摹 (3) é”· é”· é”· 啵 啵 锛渑 锛渑 锛渑 锛渑 涕 涕 涕 涕 å± å± å± å± screenå±>
Most of the trees infected with Huanglong disease are lacking in primed yellowing. They are mainly zinc-deficient (commonly known as capsicum leaves) or deficient in manganese-yellow leaves, but they cannot be used as field judgements to determine if it is the main cause of Huanglong disease. symptom.
How to distinguish between yellow iron deficiency yellowing and yellowing of citrus trees? It can be judged by the fruit and whether there are mottled yellow leaves, or it can be roughly judged by the time of yellowing and the soil. The iron-deficient yellow citrus fruit is normally yellow, while the yellow-yellow yellow tree has abnormal yellow. If it is spring shoot yellow and autumn shoot is not yellow is likely to be iron deficiency yellow, the opposite if it is spring shoot is not yellow and autumn shoot yellow is likely to Huanglong Huang.
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