Wheat stripe rust prevention and control
2022-08-29 09:04:45
I. Treating both the symptoms and the symptoms 1. Implementing the rational layout of multi-genotypes: The occurrence of wheat rust is the result of interaction between wheat and rust populations under certain environmental conditions. If the resistance genes of the produced varieties are diversified, it is not conducive to the directional selection of pathogenic bacteria, thereby reducing the chances of the emergence and development of new races of pathogens, and also extending the use limit of resistant varieties. In this way, the wheat variety group with rich and diverse disease resistance genes and the complex and diverse pathogen groups become an interaction system, maintaining a relatively stable dynamic balance, and not causing large-scale diseases due to the emergence and development of a new small species. popular. Therefore, our province should speed up the promotion of different genotypes of disease-resistant varieties to reduce the current damage caused by stripe rust to wheat production.
2. In the key areas where the stripe rust is over-summer and wintering, the amount of bacteria in the source base of wheat stripe rust from the source: Yuexia District: (1) Completely replace the planting of the same genotype with the mainland; (2) Strictly control the area where the autumn seedlings are early and the surrounding environment, in addition to the implementation of winter wheat before ploughing 1-2 times, and use the chemical to control the central disease field and surrounding fields of autumn seedlings; (3) promote winter wheat before planting All pesticides should be used for seed dressing, delaying the early development of bacterial sources and reducing the amount of bacteria; (4) delaying the sowing period, delaying the planting time in the summer area in the middle and late October; (5) for the spring wheat area, Implement medication protection. Wintering area: In all parts of the province (city), there are different areas of wintering field. Except for the layout of different genotypes in Pingba, for some early-onset areas, early winter prevention and early treatment can be implemented. After spring Comprehensive drug protection, seeding before seeding. In particular, attention should be paid to the prevention and control of the mid-mountain bridge area around the Pingba. Only by strictly controlling the amount of pre-winter bacteria can the stress of the post-spring incidence be reduced, and the prevalence is also reduced.
3. Adopting species diversity to control stripe rust: At present, the use of new methods for species diversity control has also achieved certain results in the prevention and control of wheat stripe rust. Species diversity is equal to the mixed planting of multiple wheat varieties. It is for a variety of crops grown in the same season. For example, with the growth of wheat in the same season, there are broad beans, camellia, garlic, potatoes, vegetables, herbs and so on. That is to say, the use of a variety of crops symbiotic in nature to achieve the purpose of controlling the occurrence of wheat stripe rust. The principle is to block the special propagation mode of stripe rust (high-altitude long-distance transmission) to control the amount of foreign bacteria received by wheat, and to reduce the incidence and re-transmission opportunities.
4, chemical control: At present, there are many kinds of pharmaceuticals on the market, there are special effects of Bai Litong, powder rust and so on. However, in practice, we should also pay attention to: (1) Strengthen the training of agricultural technical cadres, and correctly use the types of pesticides and methods of use. (2) In the key areas where the source of stripe rust is required to be over-summer and wintering, it is necessary to carry out seed dressing before the sowing, and strengthen early prevention and early treatment in winter. (3) In areas where the stripe rust occurs early in winter and its surrounding areas, it is necessary to control the medicine after spring to ensure normal growth in the late stage of wheat and reduce yield loss.
Second, strengthen the implementation of prevention and control measures 1. In key areas of the summer, in addition to the layout of different genotypes, the wheat planting area should be gradually reduced to reduce the pressure of stripe rust in the winter wheat area and slow down the speed of new species.
2, the drug to prevent wheat stripe rust is generally used triazolone (Powderen) powder or emulsifiable concentrate, 150 g / mu. You can also choose Syngenta's Tilt 25% emulsifiable concentrate, 25 ml/mu; BASF's opus 12.50 g/mu. It takes about 40 days to take the medicine once, and the effect is very good. In addition, the domestic cyanocin, diniconazole, powdery bacteria and other special control effects are also good. It is understood that this year in many parts of our province, the incidence of wheat powdery mildew is heavier, and the above-mentioned agents can treat both powdery mildew. Since the pathogen of wheat stripe rust is mainly produced on the back side of wheat leaves, the leaf back should be the main spray. In order to improve the adhesion of the liquid on the leaf surface, a small amount of washing powder can be added during the dispensing, and the liquid is thoroughly stirred and sprayed, so that the effect is better. (Luo Linming, Liao Huaming)
Excerpted from: 2006.2.14.4 "Sichuan Science and Technology News"
2. In the key areas where the stripe rust is over-summer and wintering, the amount of bacteria in the source base of wheat stripe rust from the source: Yuexia District: (1) Completely replace the planting of the same genotype with the mainland; (2) Strictly control the area where the autumn seedlings are early and the surrounding environment, in addition to the implementation of winter wheat before ploughing 1-2 times, and use the chemical to control the central disease field and surrounding fields of autumn seedlings; (3) promote winter wheat before planting All pesticides should be used for seed dressing, delaying the early development of bacterial sources and reducing the amount of bacteria; (4) delaying the sowing period, delaying the planting time in the summer area in the middle and late October; (5) for the spring wheat area, Implement medication protection. Wintering area: In all parts of the province (city), there are different areas of wintering field. Except for the layout of different genotypes in Pingba, for some early-onset areas, early winter prevention and early treatment can be implemented. After spring Comprehensive drug protection, seeding before seeding. In particular, attention should be paid to the prevention and control of the mid-mountain bridge area around the Pingba. Only by strictly controlling the amount of pre-winter bacteria can the stress of the post-spring incidence be reduced, and the prevalence is also reduced.
3. Adopting species diversity to control stripe rust: At present, the use of new methods for species diversity control has also achieved certain results in the prevention and control of wheat stripe rust. Species diversity is equal to the mixed planting of multiple wheat varieties. It is for a variety of crops grown in the same season. For example, with the growth of wheat in the same season, there are broad beans, camellia, garlic, potatoes, vegetables, herbs and so on. That is to say, the use of a variety of crops symbiotic in nature to achieve the purpose of controlling the occurrence of wheat stripe rust. The principle is to block the special propagation mode of stripe rust (high-altitude long-distance transmission) to control the amount of foreign bacteria received by wheat, and to reduce the incidence and re-transmission opportunities.
4, chemical control: At present, there are many kinds of pharmaceuticals on the market, there are special effects of Bai Litong, powder rust and so on. However, in practice, we should also pay attention to: (1) Strengthen the training of agricultural technical cadres, and correctly use the types of pesticides and methods of use. (2) In the key areas where the source of stripe rust is required to be over-summer and wintering, it is necessary to carry out seed dressing before the sowing, and strengthen early prevention and early treatment in winter. (3) In areas where the stripe rust occurs early in winter and its surrounding areas, it is necessary to control the medicine after spring to ensure normal growth in the late stage of wheat and reduce yield loss.
Second, strengthen the implementation of prevention and control measures 1. In key areas of the summer, in addition to the layout of different genotypes, the wheat planting area should be gradually reduced to reduce the pressure of stripe rust in the winter wheat area and slow down the speed of new species.
2, the drug to prevent wheat stripe rust is generally used triazolone (Powderen) powder or emulsifiable concentrate, 150 g / mu. You can also choose Syngenta's Tilt 25% emulsifiable concentrate, 25 ml/mu; BASF's opus 12.50 g/mu. It takes about 40 days to take the medicine once, and the effect is very good. In addition, the domestic cyanocin, diniconazole, powdery bacteria and other special control effects are also good. It is understood that this year in many parts of our province, the incidence of wheat powdery mildew is heavier, and the above-mentioned agents can treat both powdery mildew. Since the pathogen of wheat stripe rust is mainly produced on the back side of wheat leaves, the leaf back should be the main spray. In order to improve the adhesion of the liquid on the leaf surface, a small amount of washing powder can be added during the dispensing, and the liquid is thoroughly stirred and sprayed, so that the effect is better. (Luo Linming, Liao Huaming)
Excerpted from: 2006.2.14.4 "Sichuan Science and Technology News"
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