Exclusively sold by Bootstrap Farmer - a long lasting and easy way to install your greenhouse covering. Aluminum Lock Channel will help to ensure that your greenhouse can weather the elements and last for years. Unlike other attachment methods, Lock Channel and Wiggle Wire will hold up to high winds and harsh environments.
Lock Channel Lock Channel,Greenhouse Lock Channel,Channel Lock Pliers JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , http://www.spgreenhouse.com
Study on the Characteristics of Production of Cabbage in Winter and Harmless Treatment of Diseases and Insects
1 Hanjiang District Ecological Conditions and Winter Cabbage Planting Characteristics 1.1 Ecological Conditions Hanjiang District is located in the central coastal area of ​​Fujian Province. Except for northwest and northeastern red soil hills, the rest are all plains in the Linhai Plain. Hanjiang is a typical marine climate with an average annual temperature of 20.2°C. The region's atmosphere is fresh, rivers are clean, clean, and rich in water resources. It is a good base for the production of pollution-free vegetables. 1.2 Planting characteristics Hanjiang District always plants 15,000 mu of winter cabbage, which is generally planted in mid-September and transplanted in mid-to-late October. According to the variety and growth period, it is harvested from mid-December to early February. . Most of the winter cabbage cabbage crops are rice, soybeans, peanuts, sweet potatoes and other crops. 2 Among the main insect pests of winter cabbage, the incidence of Plutella xylostella was the most, followed by Aphids, Pieris rapae, and Spodoptera litura; the most common occurrence was black rot, followed by downy mildew and soft. Rot and black spot. If these pests are not controlled in time, they can cause severe reductions in production or even no harvest. 3 Harmless treatment of cabbage pests in winter The technology for the harmless treatment of vegetables, pests and diseases is one of the main technical measures for protecting the ecological environment and remediation of table pollution. It is also an urgent requirement for the export of agricultural products. 3.1 One of the fitness training, the implementation of paddy crop rotation, interplanting. Our district has promoted the cultivation of rice from April to October in large scale, and cultivated cabbage from November to March. The cultivation pattern of cabbage is mainly cultivated in specialized households. The planting and harvesting periods are neat, which can play a role in “removing bridges and bridgesâ€. , Significantly reduce the damage of many kinds of pests such as the moth and cabbage butterfly. At the same time, the cabbage and onion and garlic crops are interplanted, and they are planted at a distance away from the insects of Plutella xylostella, Pieris rapae, or separated from non-cruciferous vegetables. At the same time, as much as possible, they are not even connected to cruciferous vegetables with a short growing period. Slice, annual planting, pest damage can be reduced by more than 25%. Second, plough deep into the sun and clean the pastoral area. After the harvest, timely remove the stubble leaves and surrounding weeds in the field, plow till the sun, turn the topsoil deeper than 20cm, exposure to 15 to 30 days, you can loosen the soil, but also reduce the source of pests. Third, select and promote the varieties that are resistant to black rot and soft rot. According to the survey, 33.4% of the elite varieties of cabbages in our region accounted for 33.4%, 16.7% for Changgang cabbage, 12.3% for Zhonggan No. 11 cabbage, 15.4% for Jingfeng No. 1 cabbage, 8.3% for cabbage in four seasons, and Shuangfeng No. 2 for spring and autumn. (Japan) accounts for 4.3%. Fourth, nurture strong seedlings. Choose a field with high topography, good drainage and irrigation, fertile soil and no cruciferous vegetables for 2 to 3 years. Seed before sowing is soaked in warm water at 50°C for 20 minutes or with 50% omeprazole WP. After sowing, the seeds were sown, and field management at the seedling stage was carried out. Potassium and potassium fertilizers were added to cultivate disease-free and strong seedlings. Fifth, manual killing. Based on the abundant labor resources and the intensive cultivation tradition in our district, the diseased plants were removed timely, nocturnal moth eggs and unspread young larvae were removed, and the insects against Plutella xylostella, Pieris rapae, and Spodoptera litura had pseudo-dead features. The long bamboo poles shake the plants and then catch the larvae on the soil surface around the plants. Sixth, strengthen management of water and fertilizer, and ensure close planting. The first is to prevent seeding too dense and adopt double colonization. Early varieties such as Champion Cabbage and Zhong Gan No. 11 Cabbage should be 35cm45cm in row spacing, 40cm55cm in mid-maturing variety Jingfeng 1, and 60cm75cm in late-maturing variety Longgang. The second is to use enough farmyard manure, rational application of nitrogen fertilizer, increased phosphorus and potassium fertilizers, timely top dressing, seedling stage nitrogen: phosphorus: potassium is 3:1:2; ball stage nitrogen: phosphorus: potassium is 3:1:4. The third is to select the soil with rich fertile, well-drained sandy loam or clay loam. The low-lying land should be deep sorghum and short ridges. After the rain, the gutters will be drained to reduce the humidity in the field, which will help the plant growth and increase the resistance to pests. ability. 3.2 Insect pest monitoring set up a systematic observation area, surveyed once every 5 days. The larvae of Plutella xylostella larvae consisted of 100 to 100 cultivars in the pre-encapsulation stage and 100 to 250 in the late culturing stage. The appropriate control period was about 1 week after the egg laying peaks of the diamondback moth and cabbage butterfly, and cabbage was suitable for pre-bagging. . Based on the weather conditions and the occurrence and development of the disease center field, timely release pest information, do prevention and control, and control the disease in the initial stage. 3.3 Physical control After 7 to 10 days after the transplanting period of cabbage, black-light, sweet and sour pots, sex attractants, and yellow armyworm board were used to trap and kill pests according to the insect conditions. 3.4 Biological control measures include the use of (Bt) Cainon No. 2, (Bt) Cainon No. 5, strong enemy-311, strong enemy-312, Tianba, Abirubin and other biological agents for the rotation of Plutella xylostella, Pieris lepidoptera and other lepidoptera species. Pests, to slow down the emergence of drug resistance, keep control efficiency above 88%. Application of agricultural streptomycin, neomycin, control of black rot, soft rot and other bacterial diseases, has a good control effect. The above biological pesticides in our district to promote the use of area occupied by drugs to control more than 70% of the area. 3.5 Chemical Control First, choose an effective agent. In recent years, the most effective control agents have been selected as follows: During the period of multiple insects, use 10% to dilute 1000 times of the suspension agent, or 2.5% of the vegetable suspension agent 1000 times, or 1000 times of the 5% Regent suspension agent. Liquid, or 35% sinave oil 2000 times with "312" or Tianli, the control of diamondback moth, cabbage caterpillar and other effects of more than 85%. With 10% imidacloprid wettable powder 1000 times, 50% of the new era fog mist wettable powder 2000 times liquid control aphids. With 58% metalaxyl, MnZn wettable powder 500 times liquid to prevent downy mildew. 77% can be used to kill WP 500 times, or 72% of agricultural streptomycin sulfate 3000 times soluble powder, or 75% chlorothalonil WP 6000 times to control black rot, soft rot and other diseases. If downy mildew and black rot occur concurrently, use 40% triethylphosphonate wettable powder 200 times liquid plus 50% aprotinine wettable powder 1000 times or 70% mancozeb zinc wettable powder 500 times Liquid once every 7 to 10 days, continuous control of 2 or 3 times, better control effect. Second, improve spray technology. Improve the nozzle and change the spray hole diameter of Gongnong 16 or 17 type manual sprayer from 1.3mm to 0.7~1mm so that the spray droplets are finer, the coverage is larger and more uniform, which can not only save the dose but also improve Control effect. Third, implement national regulations. According to the relevant regulations for the production of pollution-free vegetables, the use of highly toxic pesticides is strictly prohibited and the drugs are administered according to the national safety intervals. Fourth, carry out pesticide residue testing. In order to safeguard the interests of consumers, each large professional household and vegetable wholesale market is equipped with a pesticide residue rapid detection detector to ensure that the pesticide residues in listed vegetables do not exceed the standard; at the same time, the sales and management of pesticides in Ley District is strengthened, and severe poisoning and high toxicity are cut off. The sales channels of pesticides further push the production of pollution-free vegetables to a new level. Author: Hanjiang District Plant Protection and Phytosanitary Station, Putian City, Fujian Province