What is the cause of konjac disease? How to prevent konjac disease? The following Hui Nong network Xiaobian will take everyone from the konjac growth environment and other links for everyone to analyze. 1 reason 1.1 Changes in ecological conditions 1) Konjac changed from sporadic planting in front of the house to large-scale planting, which changed the original ecological environment and raised the konjac disease population into the main pest population. The population density increased, which led to an increase in the incidence of konjac infection. Causes serious occurrence of konjac disease. 2) Konjac is a semi-negative plant that requires a certain degree of shading. However, after the konjac was planted in the front and rear of the house and turned into a large field, the shading degree was small or even no shading, which changed the original habitat, increased the temperature in the field, increased the activity of pathogenic bacteria, and increased the probability of plant susceptibility. 1.2 kinds of poor quality 1) When seeding, no seed picking is selected, or the seed is selected from the seriously ill plot, or the seedling is not graded, or the good seed and the disease are mixed, resulting in serious disease. 2) The development of konjac in the new district often needs to be transferred from other places, especially from the old areas. The improper method of long-distance transfer causes serious damage to the konjac, resulting in serious diseases. 3) The seedlings were not selected, and the seedlings were not disinfected at the time of sowing, and the seedlings were affected by the seedlings, or they died after emergence. 1.3 Soil is not sterilized In addition to the invasion of konjac from the wound, soil-borne bacteria are also one of the important ways. The growth of konjac is in the rainy season. The pathogens remaining in the soil spread with the water in the soil and gradually spread to the whole plant, causing the konjac to fall and die. 1.4 Improper planting measures 1) Tongtian continuous work. The economic value of konjac is high, and farmers have limited arable land. They are often planted in the same field for several years, often causing a soft rot pandemic. In particular, continuous planting of waterlogged land, low-lying fields and mountainous areas is more serious. 2) Poor management. The main manifestations are the cultivating injury and the roots of konjac. The irrigation and drainage are not timely, and no overgrass or shading is applied during the hot and dry season. 3) Improper fertilization. At present, in most planting areas, re-application of nitrogen fertilizer, less application of phosphate fertilizer, potassium fertilizer, or even no application of phosphorus and potassium fertilizer, resulting in greatly reduced konjac disease resistance. 1.5 Ineffective measures 1) The awareness of disease prevention among farmers is weak. It is believed that konjac is a lazy crop. It can be harvested after planting. Even if there is a certain awareness of disease prevention, remedial measures are taken after a large area of ​​disease, and the control effect is not satisfactory. 2) At present, there are few pesticides used in the prevention and treatment of konjac diseases, and the effect is poor. Only agricultural streptomycin and carbendazim have certain effects. 1.6 Improper storage method causes severe konjac disease In recent years, most farmers have put the konjac into their homes for storage, and due to improper storage methods, management is not in place, resulting in serious losses. The main performance is that the pre-treatment is not carried out before storage, that is, no part of the water is removed by sunlight after the excavation, but the water is stored directly, the water content is high, and the seeds are easily rotted; the storage method is often due to individual species. Onset, the bacterial fluid rapidly infects the surrounding seedlings, causing piles of disease; the storage site is not disinfected; the management during storage is not good. 2 Prevention measures 2.1 Creating an environment suitable for konjac growth According to the original living habits of the konjac, artificially create an environment suitable for the growth of konjac. That is to say, as a mere intercropping and intercropping (such as Lin Mo intercropping), the principle of biodiversity is fully applied to create an ecological environment suitable for the growth of konjac and to alleviate konjac diseases. 2.2 Strictly control the species The most important part of the cultivation of konjac is to close the good seeds, there is no good seedlings, and often do more with less. Specific measures include selected species, that is, choose bud straight, strong, shallow and flat buds, no damage, no virus, and the transverse diameter is about the same as the longitudinal diameter of the seedlings; care should be taken when transporting the seedlings to avoid damage to the seed coat. , planting buds; planting disinfection before planting, to avoid improper treatment of damage to axillary buds, affecting emergence. 2.3 Scientific planting It is cultivated into small cultivar cultivation or high ridge cultivation, which is conducive to drainage; the soil is disinfected before planting. The test shows that the soil is disinfected with lime before planting, which can achieve good effect and economical purpose; The blocks are finely ploughed to remove residues from the plot; 2.4 Timely rotation Rotary plots in the same field, usually in a three-year round, avoid crop rotation with eggplant, flue-cured tobacco, pepper, etc.; strengthen management, shallow cultivating, ensure smooth flow of the ditch, prevent stagnant water; carry out alfalfa cover in high temperature and dry season; The stalk crop corn is shaded; according to the fertilizer requirement of konjac, reasonable fertilization is carried out, potassium:nitrogen:phosphorus=8:6:1. 2.5 Strengthen disease prevention When the konjac leaves, choose pesticides with good control effect for 3 to 5 sprays every 10 days to prevent disease; more pesticides to prevent konjac disease test, and screen out good and economical pesticides for production. 2.6 Scientific storage Pre-treatment of the seedlings; choose a place that is ventilated and ventilated during storage, and the storage pile should not be too high for inspection; when it is found to be sick or rotten, it should be removed immediately, and the surrounding seedlings should be disinfected again to prevent the spread of the bacteria. In case of cold weather, warm up the konjac. The above is all the content of today, the farmers who planted the konjac can learn more reference! Heavy Biometric Safe Box,Double Door Safe Box,Combination Safe Box,Customizable Safe Box Hebei Yingbo Safe Boxes Co.,Ltd , https://www.yingbosafes.com
Talking about the causes of konjac disease and its prevention and treatment measures