Morphological characteristics of Polygonatum sibiricum
Polygonatum is a perennial herb, the rhizome is horizontal, fleshy, yellowish, the apex sometimes protrudes like a chicken's head, the stem is erect, 50-90 cm high. Leaves verticillate, 4-6 per whorl, linear-lanceolate, 8-15 cm long and 04-1.6 cm wide, apex curled. Flowers axillary, often 2-4 florets, pendulous, total pedicel 1-2 cm long; perianth tubular, white to yellowish, 0.9-1.2 cm long, apex 6-lobed, stamens 6, filaments shorter, 0.5-1 mm long, style 1.5-2 times as long as ovary, berries globose, black at maturity. The flowering period is from May to June and the fruiting period is from July to September.
The main characteristics of Polygonatum polygonatum are as follows: stem 40-100 cm high, leaves alternate, oval, ovate-lanceolate to oblong-lanceolate, 3-5 veins. Pedicel with 2-7 (- 14) flowers, arranged in umbrella shape on total pedicel; perianth yellowish green, 1.8-2.5 cm long; filaments papillose or puberulent, apex dilated to cystic protuberance.
The main characteristics of Polygonatum yunnanensis are as follows: the stem is 1-3 meters high, the top is often twining, the leaves are whorled, 4-8 in each round, the leaves are linear to linear-lanceolate, 6-20 cm long, 0.3-3 cm wide, and the apex acuminate and roll. Pedicels bearing flowers 2-3, not umbellate; perianth pink, 1.8-2.5 cm long, berries red when ripe.
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Polygonatum leaf spot
The disease began from April to May, and the damaged leaves first appeared oval or irregular shape from the leaf tip, brown on the outer edge and light white in the middle, which spread downward from the disease spot, causing the leaves to scorch and die. The disease is more serious in the rainy season. Control methods: clean the fields after ① harvest, burn the remains of withered branches and eliminate the pathogen of overwintering. Before and at the initial stage of the onset of ②, the patients were sprayed with 100 times Bordeaux solution or 1000 times of 50% acetaminophen, once every 7 days and 4 times in succession.
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How to carry out field management by Huang Jing
(1) weeding should be carried out frequently after weeding and emergence, especially at the seedling stage of sowing fields, so as not to bully the seedlings and affect their growth. (2) the seedlings were too dense when the height of the seedlings was 5-8 cm, and the seedlings were fixed according to the plant spacing of 8-10 cm before withering in autumn or after emergence in the following year. Take the seedlings from time to time to different places for transplanting. (3) drought prevention and drainage Huang Jing likes the soil moist, timely watering in case of dry weather to keep the soil moist; drainage in the rainy season to avoid stagnant water in the field and prevent rot
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