Chemical and biological products for control of powdery mildew on cucumber

2021 ◽  
pp. 1-6
Author(s):  
Meysam Safaei ◽  
Abbas Jorkesh ◽  
Jamalali Olfati
Keyword(s):  
Powdery Mildew ◽  
Biological Products

scholarly journals PREVENTIVE AND CURATIVE CONTROL OF Oidium eucalypti IN Eucalyptus benthamii CLONAL SEEDLINGS

2018 ◽  
Vol 42 (5) ◽  
Author(s):  
Marcieli Pitorini Bovolini ◽  
Marília Lazarotto ◽  
Mateus Pereira Gonzatto ◽  
Larissa Campos de Sá ◽  
Norton Borges Junior
Keyword(s):  
Powdery Mildew ◽  
Trichoderma Harzianum ◽  
Disease Index ◽  
Distilled Water ◽  
Trichoderma Spp ◽  
Biological Products ◽  
Bacillus Spp ◽  
Severity Of The Disease

ABSTRACT One of the main diseases occurring in clonal nurseries of Eucalyptus spp. is powdery mildew caused by the fungus Oidium eucalypti. This work evaluated the efficiency of biological products based on Trichoderma spp. and Bacillus spp. applied as preventive and curative treatments for the control of Oidium eucalypti in clonal seedlings of E. benthamii Maiden et Cambage. Treatments were: Trichoderma harzianum (THP), T. atroviride (TAI), T. harzianum (THE), Trichoderma spp. (TTA), Bacillus spp. (BNE), Sulfur (KUM), Difenoconazol (SCO) and distilled water (AD). Treatments were applied preventively by spraying seven days before inoculation of the pathogen, and in curatively, ten days after inoculation. Weekly evaluations of the incidence and severity of the disease were done. The analyzed variables were: Disease Index (ID) and Incidence (I), calculating the area under the disease curve (AUDPC) for each treatment. The results pointed BNE (Bacillus spp.) and TAI (isolate T. atroviride) as effective preventive treatments and BNE (Bacillus spp.), applied curatively for the control of O. eucalypti in E. benthamii seedlings, proving that treatments based on biological products may be effective for controlling eucalyptus powdery mildew in clonal nurseries.

Microscopy studies of powdery mildew on summer squash

1991 ◽  
Vol 49 ◽  
pp. 520-521
Author(s):  
John S. Gardner ◽  
W. M. Hess
Keyword(s):  
Powdery Mildew ◽  
Tip Growth ◽  
Hyphal Growth ◽  
Plant Tissues ◽  
Vegetative Hypha ◽  
Powdery Mildews ◽  
Summer Squash ◽  
Conidial Formation ◽  
Polar Tip Growth ◽  
Short Conidiophore

Powdery mildews are characterized by the appearance of spots or patches of a white to grayish, powdery, mildewy growth on plant tissues, entire leaves or other organs. Ervsiphe cichoracearum, the powdery mildew of cucurbits is among the most serious parasites, and the most common. The conidia are formed similar to the process described for Ervsiphe graminis by Cole and Samson. Theconidial chains mature basipetally from a short, conidiophore mother-cell at the base of the fertile hypha which arises holoblastically from the conidiophore. During early development it probably elongates by polar-tip growth like a vegetative hypha. A septum forms just above the conidiophore apex. Additional septa develop in acropetal succession. However, the conidia of E. cichoracearum are more doliform than condia from E. graminis. The purpose of these investigations was to use scanning electron microscopy (SEM) to demonstrate the nature of hyphal growth and conidial formation of E. cichoracearum on field-grown squash leaves.

Chromosomal location of genes for resistance to powdery mildew in Chinese wheat lines Jieyan 94-1-1 and Siyan 94-1-2

Hereditas ◽  
2002 ◽  
Vol 136 (3) ◽  
pp. 212-218 ◽  
Author(s):  
XIU QIANG HUANG ◽  
SAI L. K. HSAM ◽  
FRIEDRICH J. ZELLER
Keyword(s):  
Powdery Mildew ◽  
Chromosomal Location ◽  
Wheat Lines ◽  
Chinese Wheat

Incidence of powdery mildew on cucurbit plants in Katsina, Nigeria

2019 ◽  
pp. 05-09
Keyword(s):  
Powdery Mildew ◽  
Low Cost ◽  
Frequency Of Occurrence ◽  
Sphaerotheca Fuliginea ◽  
Causal Organism ◽  
Powdery Mildews ◽  
Powdery Mildew Disease ◽  
Important Disease

The presence study deals with powdery mildews in various cucurbits in Katsina city (Barhim Estate, Kofar Durbi, Kofar Sauri, Kofar Marusa and Low Cost), Nigeria. The finding shows that the areas infested with powdery mildew is one of the important disease of cucurbits. The Sphaerotheca fuliginea was identified to be the causal organism present on all observed cucurbits in the study. Highest frequency of disease was found in Kofar Sauri(79%) fallowed by Kofar Marusa (68%), Kofar Durbi (66%), Barhim Estate (65%) and the lowest frequency of occurrence of disease was found in Low Cost (55%).The intensity of the disease was moderate to severe in general but it was high in many fields, the area-wise variation was also noticed. On vegetables, the highest frequency of occurrence of powdery mildew disease was observed on L. cylindrica (76.4%) followed by C. moschata (60%), C. sativus (59.3%), C. vulgaris (53.9%) and lowest was found on C. melo (44.4%). The highest intensity of disease was found on C. moschata, followed by L. cylindrica, C. sativus, C. vulgaris and C. melo.

THE INFLUENCE OF BIOLOGICAL PRODUCTS ON THE GROWTH DEVELOPMENT AND YIELD OF RE-SOWINGSUNFLOWER

2019 ◽  
Vol 6 (1) ◽  
pp. 40-46
Author(s):  
Tadjidin Uraimov Tadjidin Uraimov ◽  
◽  
Matluba Yakhyokulova
Keyword(s):  
Biological Products ◽  
Growth Development

Impact of the estimated doses of mineral fertilizers on the infestation mildew, pyrenophora and yield of winter wheat varieties

2020 ◽  
Author(s):  
A.Y. Ozheredova ◽  
◽  
A. N. Esaulko ◽  
L.A. Mikhno ◽  
A.P. Shutko ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Winter Wheat ◽  
Mineral Fertilizers ◽  
Wheat Varieties ◽  
Leached Chernozem ◽  
Winter Wheat Varieties

The article presents materials on the influence of calculated doses of mineral fertilizers on the incidence of powdery mildew, pyrenophorosis and yield of winter wheat varieties cultivated on leached Chernozem for 2016-2018.

The effectiveness of biological pesticides in the cultivation of winter wheat for various previous crops for the purposes of protection against Septoria and increasing productivity

2020 ◽  
Author(s):  
O.I. Vlasova ◽  
◽  
E.A. Danilets ◽  
V.M. Perederieva ◽  
I.A. Volters
Keyword(s):  
Winter Wheat ◽  
Biological Products

the article provides data on the effectiveness of the use of biological products in the fight against septoria infection of winter wheat, placed on various predecessors and the formation of yield.

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