scholarly journals Pesticide load reducing in vineyard protection from powdery mildew

2021 ◽  
Vol 273 ◽  
pp. 01001
Author(s):  
Natalia Arestova ◽  
Irina Ryabchun

The results of studies on the possibility of applying the biological product Bacillus subtilis for the protection of vineyards from powdery mildew are presented. Meteorological conditions in 2016 and 2018 contributed to the epiphytotic prevalence of powdery mildew in the agrocenosis of Rostov region. In 2015, 2017 and 2019 its prevalence was moderate. The use of biological preparation against powdery mildew showed the prospects of its application. With a moderate degree of disease prevalence, the use of a biological preparation instead of chemical fungicides is possible in all phases of a growing season. It inhibits the pathogen’s development, contributes to conservation of plants’ productivity and reducing the pesticide load. In years with epiphytotic prevalence of powdery mildew it is desirable to apply fungicides during pre-veraison, and biopreparation – up to the phase of technical maturity. Such application will contribute to obtaining a quantitative and qualitative yield, and will also reduce the toxicological effect of chemical fungicides used in the first half of a growing season.

Author(s):  
M. K. Dereviagina ◽  
S. V. Vasilieva ◽  
G. L. Belov ◽  
V. N. Zeiruk

In field experiments, five schemes of using drugs of different spectra of action were tested in order to reduce the chemical load on the potato biocenosis. Insufficient efficiency of using only biologicals in protecting potatoes from diseases is quite natural. Its use should be combined with chemical pesticides, reducing the number of chemical treatments, but not reducing the effectiveness in combating diseases and crop yields. The study of the effect of the biological product Kartofin as a disinfectant of potato tubers and a fungicide for the treatment of vegetative plants in comparison with the chemical preparations Emesto Quantum and Consento, the alternation of the biological product and chemical fungicides on the economic indicators of the Sante variety. According to the results of twoyear testing it was revealed that the biological product Kartofin and chemical preparations do not cause negative effect on the growth qualities of potatoes and on its immunity. The use of the biological product contributed to a decrease in the development and spread of rhizoctoniosis and alternaria, while being inferior in effectiveness to chemical drugs. Against the causative agent of late blight, the use of the biological product Kartofin was ineffective. At the same time, replacing one treatment with Kartofin during the period of closing the tops in rows for the Consento treatment enabled to reduce the degree of development of the disease by 2 times until the middle of the growing season. The use of the chemical fungicide Consento enabled to protect plants from late blight by the end of the growing season with an efficiency of up to 54.2%. The use of the biological product Kartofin during the growing season enabled to increase the yield by 6.8-7.9% (1.2-1.4 t / ha) compared to the control. The replacement of one treatment with Potato for the Consento treatment increased the yield by 14.1-16.9% (2.5-2.9 t / ha). The use of the chemical dressing agent Emesto Quantum followed by the processing of Consento plants increased the yield by 18.9% (3.3 t / ha). The treatment of seed tubers with Potato helped to obtain a crop free from rhizoctonia. Thus, the use of Kartofin as a disinfectant and fungicide for treatments during the growing season with the replacement of one treatment with Consento during the closing of the tops in a row increases the yield of standard products by 20.1%.


2021 ◽  
Vol 845 (1) ◽  
pp. 012026
Author(s):  
V A Sergeeva ◽  
A A Muravyov ◽  
L M Vlasova

Abstract The production experiments were carried out based on the farm “Yaroslav the Wise” of the Starooskol district of the Belgorod region. The article studies the effect of the biological product Biogor KM during the pre-sowing treatment of grain in combination with double spraying of growing plants of spring durum wheat Dar Chernozemya 2. One of the experiments provides for grain processing with the period of “germination-ripening” of its wheat plants reduced by 8 days. The second variant, in addition to processing the grain, had two sprayings carried out during the growing season. The second experiment lasted even less by 12 days in comparison with the control variant. The article establishes the positive influence of the biological product on the formation of the productivity structure of spring durum wheat plants. Grain processing in combination with spraying during the growing season led to the formation of the best productivity structure: plant height was 39% higher, the number of spikelets was 41.8% higher, the number of spikelets was higher by 35.3%, and the grain weight per spike was 39.2%. versus the control variant. The yield in the experiment was in direct proportion to the method of application of the biological product and the conditions of the growing season. The largest increase in yield - 0.40 t / ha or 14.5% was obtained in the variant with grain processing in combination with double spraying of plants during the growing season, the average yield for the studied period was 3.14 t / ha and was maximum, indicators of economic and bioenergy efficiency was also the best.


Author(s):  
O.V. Sviridova ◽  
◽  
N.I. Vorobyov ◽  
Ya.V. Pukhalsky ◽  
O.N. Kurchak ◽  
...  

To identify microorganisms that can penetrate into the endophytic niche of the grain of barley plants, many years of vegetative experiments were conducted on sod-podzolic soil without the use of mineral fertilizers. In the non-growing season, a biological product, consisting of cellulolytic association of bacteria with genotypic passport, decomposed barley straw. Presowing treatment of seeds was not carried out, therefore, during the growing season; local microorganisms decomposing plant residues could be present in the barley rhizosphere. After six years of rotation of barley plants, the microbiological composition of its seed niche was studied. As a result, it was found that in the seeds of barley bacteria are present in an amount of 240 ± 20 CFU/g of grain. Isolated pure cultures of microorganisms were identified as Cellulomonas gelida, Micrococcus luteus and Bacillus licheniformis by the sequence of ITS fragments of 16S rRNA. These types of bacteria were also present in the used biological product. Based on the research conducted, it can be assumed, that permanent cultivation of barley plants and sowing of seeds of the previous year can contribute to the formation of effective microbial and plant biosystems that are resistant to environmental stress.


2008 ◽  
Vol 74 (20) ◽  
pp. 6327-6332 ◽  
Author(s):  
Josselin Montarry ◽  
Philippe Cartolaro ◽  
François Delmotte ◽  
Jérôme Jolivet ◽  
Laetitia Willocquet

ABSTRACT Isolates of the causal ascomycete of grapevine powdery mildew, Erysiphe necator, correspond to two genetically differentiated groups (A and B) that coexist on the same host. This coexistence was analyzed by investigating temporal changes in the genetic and phenotypic structures of E. necator populations during three epidemics. Group A was present only at the start of the growing season, whereas group B was present throughout all three epidemics. Group A was less aggressive in terms of germination and infection efficiency but was more aggressive than group B in terms of the latency period, lesion diameter, and spore production. Our results are consistent with a temporal differentiation of niches, preventing recombination, and suggest an association between the disease level and the frequencies of genetic groups.


Author(s):  
Г.А. КУПИН ◽  
Т.В. ПЕРШАКОВА ◽  
П.И. КУДИНОВ ◽  
Л.В. МИХАЙЛЮТА ◽  
М.В. БАБАКИНА

Проведены исследования по определению эффективности ингибирующего действия биопрепаратов Экстрасол, Бактофит и Алирин на фитопатогены Sclerotinia sclerotiorum и Botrytis cinerea, вызывающие белую и серую гниль корнеплодов свеклы столовой в процессе хранения. Установлено, что биопрепарат Бактофит имеет наибольшую активность в отношении исследованных фитопатогенных микроорганизмов. Потенциал биопрепарата для контроля порчи свеклы столовой оценивали в опытах in vitro. Ингибирующую способность биопрепарата Бактофит по отношению к Sclerotinia sclerotiorum и Botrytis cinerea исследовали в срезах корнеплодов свеклы при температуре 25°С в течение 7 и 14 сут и при 2°С в течение 7, 14, 28 и 35 сут. Установлено, что после хранения образцов корнеплодов свеклы при температуре 25°C в течение 7 и 14 сут средний диаметр зоны поражения Sclerotinia sclerotiorum в контрольных образцах без внесения Бактофита составил 4,5 и 7,5 мм соответственно; в опытных образцах, зараженных фитопатогенном, но обработанных биопрепаратом, – 2,2 и 4,5 мм соответственно. При температуре хранения 2°C образцов корнеплодов свеклы в течение 7 сут средний диаметр зоны поражения Botrytis cinerea в контрольных образцах составил 1,8 мм, в образцах с внесением биопрепарата признаков развития заболевания не наблюдалось. После хранения образцов корнеплодов свеклы при температуре 2°C через 14, 28 и 35 сут средний диаметр зоны поражения Botrytis cinerea в образцах, не обработанных Бактофитом, составил 3,0; 5,1 и 7,4 мм соответственно; в образцах, прошедших обработку биопрепаратом, – 0,8; 2,0 и 2,5 мм соответственно. Доказана целесообразность применения биопрепарата Бактофит для контроля развития микробиальной порчи свеклы в процессе хранения. Обработка корнеплодов свеклы биопрепаратом Бактофит в сочетании с надлежащими технологиями хранения может снизить количественные и качественные потери продукции растениеводства за счет предотвращения микробиологической порчи. Some investigation were done to define effectiveness of biological preparation Extrasol, Bactofit and Alirin action on phytopathogens Sclerotinia sclerotiorum and Bothrytis cinerea, which cause diseases (white and gray rot) of beetroot during storage. It was stated that biological preparation Bactofit is most active and effective against phytopathogenic microorganisms. Potential of the biopreparation to control beethroot diseases was estimated in in vitro experiments. Antogonistic activity of biological preparations Bactofit against Sclerotinia sclerotiorum and Bothrytis cinerea was investigated in beetroot cut under 25°C during 7 and 14 days and 7, 14, 28 and 35 days under 2°C. It was found that after storage of samples of beet roots at 25°C for 7 and 14 days the mean diameter of the affected area of Sclerotinia sclerotiorum in the control samples without making Bactofit was 4,5 and 7,5 mm, respectively; in the experimental samples infected with pathogenic, but are processed by the biological product, and 2,2 and 4,5 mm, respectively. At a storage temperature of 2°C beet root samples for 7 days, the average diameter of the Botrytis cinerea lesion zone in the control samples was 1,8 mm, in the samples with the introduction of a biopreparation no signs of the disease were observed. After storage of samples of beet root crops at a temperature of 2°C through 14, 28 and 35 days, the average diameter of the lesion zone Botrytis cinerea in samples not treated with Bactophyt was 3,0; 5,1 and 7,4 mm, respectively; in samples treated with a biological product – 0,8; 2,0 and 2,5 mm, respectively.. The feasibility of application of biological Bactofit to control the development of microbial deprivation of the beets during storage proved. Processing beet biologic Bactofit in combination with appropriate storage technologies can reduce quantitative and qualitative losses of crop production by preventing microbial deprivation.


1972 ◽  
Vol 52 (5) ◽  
pp. 693-699
Author(s):  
L. V. EDGINGTON ◽  
E. REINBERGS ◽  
M. C. SHEPHARD

Two systemic fungicides, ethirimol and benomyl, effectively controlled powdery mildew (Erysiphe graminis DC. hordei) of barley and significantly increased the yield. Ethirimol performed best as a seed dressing or as granules placed in the furrow. Uptake appeared to be dependent on soil moisture. Downward leaching of ethirimol during the growing season was minimal. Application rate may need to be varied according to inoculum pressure and varietal susceptibility. Benomyl failed to give control of disease for a long enough period when applied as a seed dressing, but appeared promising as a foliar spray at midseason.


2021 ◽  
Author(s):  
Елена Козарь ◽  
◽  
И. Енгалычева ◽  
А. Антошкин ◽  
Е. Козарь ◽  
...  

The use of preparations based on secondary plant metabolites is an alternative to chemical pesti-cides, to which the vegetable bean culture is very sensitive. Аll preparations stimulate the germination and development of the root system of seedlings, which contributes to an increase in the germination and resistance of beans to Fusarium in the early stages of development. 0.01% concentration is the most op-timal for treating beans before sowing. Verbascoside exhibits a prolonged immunomodulatory effect and effectively inhibits the development of the disease throughout the growing season. Bioregulators mold-stim and linaroside work more effectively together with chemical fungicides, reducing their phytotoxicity and increasing plant stress resiastance.


2014 ◽  
Vol 18 (4) ◽  
pp. 409-416 ◽  
Author(s):  
Sung-Jun Hong ◽  
Jung-Hyun Kim ◽  
Yong-Ki Kim ◽  
Hyeong-Jin Jee ◽  
Chang-Ki Shim ◽  
...  

2021 ◽  
Vol 37 ◽  
pp. 00158
Author(s):  
Radik Safin ◽  
Guzel Khusainova

In 2018–2019, the studies were carried out in order to assess the effectiveness of the use of various biofungicides on spring bread wheat (Triticum aestivum L.) on grey wood soil in the Predkamsk zone of the Republic of Tatarstan. The agents based on Bacillus subtilis strain 63-Z (Baxis®) and Pseudomonas aureofaciens strain (Pseudobacterin 2®) were used as biofungicides. The chemical fungicides were used as a standard (for seed treatment – prothioconazole + tebuconazole (Lamador®); for spraying – spiroxamine + tebuconazole + triadimenol (Falcon®)). The research results showed that the use of biofungicides for seed treatment and spraying during the earing phase of wheat has a pronounced effect on the length of the stem and the number of grains in the ear. Under the influence of the use of biofungicides, the damage to plants by root rot, leaf septoria and powdery mildew was reduced. In terms of their effect on leaf septoria and powdery mildew, the chemical fungicides were somewhat superior to biological ones. The highest yield of spring soft wheat was obtained using the scheme in which the seeds were treated with Baxis and the plants in the earing phase were sprayed with Pseudobacterin 2. This scheme provided the increase in yield by 1.1 t / ha compared to control and by 0.29 t / ha when using standard chemical fungicides for seed treatment and spraying of crops. The use of such a scheme significantly reduces the cost of the protection of wheat plants from diseases. As a result of research, it was shown that with a weak and medium development of diseases, the use of biofungicides can be an effective alternative to the use of standard chemical fungicides.


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