Since the planting of insect-resistant cotton, the hazard of the cotton field has been rising rapidly. Fuxi has become the main pest of cotton. Recently, the author has continuously received cotton farmers and township agricultural technical personnel to reflect the problem of cotton fuxia intractable. After investigating and analyzing the main reasons why Fuxi is intractable Insect-resistant cotton has hidden dangers for the occurrence of large-scale disease in the past. When non-resistant cotton was planted in the past, cotton fields were used repeatedly to control cotton bollworms for a long time. After the planting of insect-resistant cotton, the use of cotton in the cotton field to prevent and treat bollworm was reduced by 60% to 70%. The cotton aphid was not effective and concurrent, leaving a large number of insect sources, which laid a hidden danger for the development of the cotton plant. The high temperature in the season and the light rain in the sunny area are conducive to the breeding of cotton aphids. The optimum breeding temperature of Fuxi is 24°C~28°C, and the average daily temperature in mid-July to mid-August is about 25°C, which has become an important reason for the prosperous period of Fuxi. During this period, Fuxi breeding rapidly, 3 to 5 days that is breeding generation, a locust can reproduce 50 to 70 heads, and overlapping generations, resulting in difficult control. The cotton plants in the season are tall and the rainfall at this time is frequent, which brings difficulties to control. If it rains soon after spraying, pesticides will fail. The tall cotton plants make it difficult to spray the spray thoroughly, causing more cotton aphids in the lower part of the plant to migrate upward and multiply quickly. The medicine was not selected properly and no control was allowed. At present, there are many kinds of pesticides for controlling pests in the market, and there are many kinds of fish in the market. Even those with certain professional knowledge can hardly distinguish between true and false. Some unscrupulous traders praised some poor-quality and expired pesticides as "high-efficiency, low-cost products" such as "sweeping the light" and "killing the net" to induce farmers to buy. The use of these pesticides is extremely poor, the residual period is very short, and there are even more cases of more pests. Late medication, missed the best prevention period. A lot of cotton farmers waited until the time of the Great Depression occurred in Fuxi, resulting in more workers in control, more medication, and poor results. In view of the difficult problems in Fuxi, comprehensive prevention measures should be taken Strengthen the field investigation and seize the medication during the key period. During the occurrence of Fuxi, every other day, in-depth survey of cotton fields, when the lower part of the cotton plant leaves a small number of small luminous points, cotton aphid upward shift, which is a sign of the occurrence of Fuxi, ready to wait cotton When the leaves of the plant appear 3% to 5% of the leaf volume, spraying immediately, and destroying the fleas before the damage in the field, can receive a multiplier effect. Do a good job of agricultural control. The insects of Fuxi are mostly concentrated on the old leaves at the bottom and weeds such as peony and burdock, combined with pruning to bring out the old leaves, tender pods and weeds that are planted out of the field. Thousands of" role. Actively carry out biological control. During the occurrence of Fuxi, grasshoppers, cockroaches, ladybugs and other natural enemies migrated to the cotton field. When the number of natural enemies reaches a certain number, the application of pesticides can also effectively control the damage of the earthworms. The use of phytotoxic pesticides, such as Kenting, has both good control of Fuxi and relatively safe natural enemies. Selected pesticides on the road, scientific drugs. At the initial stage of Fuxi, before the rain or before watering, use 15% iron per gram to extinguish 250-350 grams, mix well with fine soil, and apply it under 10 cm of soil. The effective period is about 50 days. In the peak period of Fuxi, 80% of dichlorvos per acre are used for 100-150 ml, 4 kg of water is added, and 7-8 kg of wheat bran are mixed. After mixing, they are applied to cotton fields from 10 a.m. to 4 p.m. %. With 40% omethoate 1000 times, or 48% of 1500 times the spray liquid, 50-60 kg per acre spray liquid. The spraying should be meticulous and considerate, so that "one turn and one buckle, four sides penetrate through," and the implementation of drug rotation alternating use.
New keys cannot be created without key blanks. Key blank packages ensure you have key blanks of all shapes and sizes that are ready to be cut to the perfect specifications. Made of brass. Surface support electroplating. A variety of key slots are available. Brass Key, high quality. Different thickness, different length.
Blank Key
Design Blank Key,Blank Safe Key,Master Lock Key Blanks,Safe Blank Key ANDJA TRADING PET. LTD. , https://www.lock-cylinder.com
How to solve the problem of cotton Fuxi difficult to cure
Made of solid brass
Keys bow design is same as originals
Meet OEM specifications