Method for reducing incidence rate of susceptible varieties by mixed sowing with clubroot-resistant rape varieties

A technology for resistance to clubroot and susceptible varieties, applied in the agricultural field, can solve problems such as loss of resistance

Active Publication Date: 2019-01-15
HUAZHONG AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, clubroot resistance is controlled by a small number of genes, and the resistance genes are specific to physiological races. If the same disease-resistant variety is planted for a long time, other physiological races mixed in the soil may become dominant races, resulting in its resistance. lost

Method used

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  • Method for reducing incidence rate of susceptible varieties by mixed sowing with clubroot-resistant rape varieties
  • Method for reducing incidence rate of susceptible varieties by mixed sowing with clubroot-resistant rape varieties
  • Method for reducing incidence rate of susceptible varieties by mixed sowing with clubroot-resistant rape varieties

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Embodiment Construction

[0023] The principles and features of the present invention are described below, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0024] Test content

[0025] This experiment was carried out in Jixi County of Anhui Province (2017), Linxiang District of Yunnan Province (2017) and Xinmin County of Liaoning Province (2018) in clubroot disease-incidence areas, and in May 2018 in Jixi County of Anhui Province. The production point was tested. The test materials were Huashuang 5 (susceptible) and Huashuang 5R (resistant). per 667m 2 The amount of seeds used is 250g, and a set of susceptible and disease-resistant varieties are mixed at a ratio of 1:9, 2:8 and 3:7 respectively, and the row spacing is 25cm, and the seedlings are not thinned at the seedling stage. Two controls were set up, one was single sowing of resistant varieties and the other was single sowing of susceptible varieties. The...

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Abstract

The invention belongs to the field of agricultural technologies, and specifically relates to a method for reducing the incidence rate of susceptible varieties by mixed sowing with clubroot-resistant rape varieties. The method for reducing the incidence rate of susceptible varieties by mixed sowing with clubroot-resistant rape varieties comprises the step of sowing at least one susceptible rape variety which is susceptible to at least one rape clubroot pathogenic physiological species and at least one clubroot-resistant rape variety which resists at least one rape clubroot pathogenic physiological species in a mixed manner. It is discovered by the inventor that good and bad conditions of various physiological species in the soil can be stabilized by mixed-sowing clubroot-resistant rape varieties and susceptible varieties in proportion, thereby ensuring the durable resistance of the varieties. In addition, the inhibition of the disease-resistant varieties to pathogens is utilized, thereby significantly reducing the incidence rate of the susceptible varieties, and ensuring the planting density of direct-seedling rape so as to stabilize the yield.

Description

technical field [0001] The invention belongs to the field of agricultural technology, and in particular relates to a method for mixed sowing with clubroot resistant rapeseed varieties to reduce the incidence rate of susceptible varieties. Background technique [0002] Clubroot is an obligate parasitic cruciferous soil-borne disease, which can lead to crop yield reduction or even failure once it occurs. The disease was first discovered on the west coast of the Mediterranean Sea and southern Europe, and now clubroot of cruciferous crops occurs in more than 60 countries around the world, reducing yield by 10% to 15% every year. Its dormant spores can survive in the soil for more than 15 years. Once the soil has clubroot, cruciferous crops cannot be cultivated. Rapeseed is an important oil crop in my country, and the perennial planting area is stable at about 100 million mu. However, the area damaged by clubroot in my country is also expanding year by year. According to statis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/15A01G13/00
CPCA01G13/00A01G22/15
Inventor 郭清云张椿雨朴钟云庞文星李晓楠蒯婕周广生
Owner HUAZHONG AGRI UNIV
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