Longshu No. 4
Characteristics: the growth period (from emergence to maturity) is 90-100 days, which is a medium-mature variety. The plant type is semi-erect, the adult plant is luxuriant, the plant height is 50-60 cm, the main stem has 7-9 branches, the stem is 10-13 mm in diameter, the stem is green. The leaf is dark green and the leaf margin is spreading. Inflorescence peduncle yellowish green, Corolla white, stamens yellow, more pollen, weak fertility, stigma 3-divided, natural occasionally fruiting. The potato block is flat, round or oval, the skin is yellow and the flesh is white, the bud eye is shallow, there are depressions in the navel, the tubers are concentrated, there are 7 tubers per plant, and the rate of large and medium tubers is 75%. High resistance to virus disease, medium resistance to late blight and strong drought resistance. In the regional trial, the yield per mu was 1472.3 kg, 32.3% higher than that of the control.
Suitable range: suitable for planting in arid areas, cold, damp and Eryin areas, and suitable for early-maturing cultivation with plastic film mulching.
Key points of cultivation: the density is 4000mm / mu in cold, shady and humid areas and 2500m / mu in arid areas, and the density of plastic film cultivation can be increased appropriately. Implement plant selection and seed retention, and advocate the use of virus-free seed potato.
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Awnless brome
Awnless brome, also known as smooth brome and awnless grass, is the most widely cultivated brome forage grass in China. It is a perennial herb with erect stems and well-developed roots. It is characterized by a short rhizome and a closed leaf sheath. This is the main feature that distinguishes it from many other grasses. Awnless brome is especially suitable for cold and dry climate, but not for high temperature and high humidity areas, and the optimum growth temperature is 14-25 ℃. Extremely cold-resistant, can still grow normally in areas with a low temperature of-30 ℃ in winter, and can withstand-4 in the northeast with snow cover.
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Wheat farmers pay attention to pest control
The reporter learned from the provincial plant protection station that the number of insect sources in the frequent occurrence areas of wheat midges in our province has generally rebounded this year, most of which are the highest in recent years, and it is estimated that the occurrence area of the whole province is about 4.5 million mu. Relevant experts suggest that the fields with high coincidence degree in the "two stages" (the stage of wheat heading and flowering and the peak emergence of adults of trematodes) should be identified as the target fields for control. According to the investigation at this station, it is found that the population base of wheat trematodes in the middle of Huaibei and along the Huaihe River is higher than that in the same period in recent years.
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