Dissertation > Excellent graduate degree dissertation topics show

Studied on Pathogen of Onion Fusarium Basale Plate Rot and Chemical Control in Jiayuguan

Author: XuDong
Tutor: LiMinQuan
School: Gansu Agricultural University
Course: Crop Protection
Keywords: The onion base plate rot Fusarium oxysporum Resistant varieties Fungicide screening Pollution-free chemical control
CLC: S436.33
Type: Master's thesis
Year: 2010
Downloads: 29
Quote: 0
Read: Download Dissertation


Rot occurred onion base plate for the new town of Jiayuguan, Gansu Province conducted a survey to study the disease pathogens. Preliminary study on the onion varieties rot disease resistance of the base plate, indoor chemical screening for prevention and control the onion base plate rot, and chemical control tests carried out in the field. 1 the onion base plate rot symptoms: early onset of leaf yellowing, wilting or bent the the fertility peak onion bulbs side was soft rot like corruption, after expansion to stem disc, all serious aboveground wilting, stem disk brown dead. White or gray mold shaped humidity scales. Dry conditions, disease tissue the purple death or dead. The pathogenic findings the Fusarium oxysporum the largest share, 69.66%, 21.99% and 8.35%, while the proportion of Fusarium solani and Fusarium order. Indoor dish Pathogenicity Test results show that the the Fusarium oxysporum condition index was 60.2, the strongest pathogenic rot main pathogens causing onion base plate. Research the Jiayuguan new towns plate method 10 onion cultivars disease resistance identification. The results show that there are differences between the varieties of onion base plate rot resistance, Fusarium oxysporum shepherd boy from the resistant performance point of view, Kim Mi F1 moderately resistant (MR) varieties, the sun Green Lion is in a sense (MS) varieties, red classic, red 08, yellow 02, Zijin 505F1, Ruby 911F1 for a sense of the variety of disease (S), Europe Panther No. 1 variety is highly susceptible (HS). 3 indoor fungicides inhibit the growth of pathogens, but there are differences between the different pharmacy. Carbendazim, chlorothalonil, evil mildew blessing facilities bacteria grams of Fusarium oxysporum effective concentration (EC50) for 69.58,158.12,143.13,6.03 μg / mL, respectively, were Fusarium solani EC50 5 The 87,152. 76,35, 75 and 70. 12μg/mL, Fusarium EC50 49.53,2.11,4.48 and 126.61μg/mL. To facilities bacteria grams inhibition is the most prominent, carbendazim followed, chlorothalonil worst. Four agents correlation coefficient above 0.98, the drug concentration was positively correlated with inhibition. Field of chemical control test in seven pesticides as test materials, the onion field chemical test in the new town of Jiayuguan City, using a randomized block design, repeated four times. Harvest of each plot were measured by the incidence of the base plate of onion rot disease index, production and other indicators, the comprehensive evaluation. The results show that the control effect is good for 15% Avi. Poison EC 1500 times, 15% avermectin. Poison EC1000 times, reached 84.79%, 81.11%. Seen 15% yield monitor Avi. Poison EC 500 times, 15% of the the Avi. Poison EC 1500 times increasing effect of the two treatments, an increase of 14.23%, 8.54%, 40% phoxim EC 800 times handling cut 6.64%. 90% trichlorfon GR (0.6g), 40%, phoxim EC 400 times, 90% trichlorfon GR (1.2g) the three processing yield differences.

Related Dissertations

  1. Preparation and Biological Effects of a Bio-Organic Fertilizer Against Banana Fusarium-Wilt Disease,S436.68
  2. Cucumber Growth Promotion and Wilt Disease Suppression of Bacillus Subtilis SQR9 and Their Mechanisms,S436.421
  3. Effects of Allelochemicals from Watermelon and Rice Root Exudates on Fusarium Wilt of Watermelon,S436.5
  4. Isolation and Identification of an Antagonistic Bacterium Against Cucumber Wilt Disease and Study of Its Relevant Properties,S436.421
  5. The Research on the Optimized Transformation System of the Green Fluorescent Protein Gene to Fusarium Oxysporum from Solanaceae Crop and Its’ Colonization Characteristics,S436.41
  6. The Pathogen of the Alfalfa Leaf Spot in Gansu Province,S435.4
  7. Study of Pathogenic and Chemical Control of Barley Leaf Stripe,S435.123
  8. Study on Broad Bean Root Rot in the Cold and Humid Regions of Gansu Province, China,S436.43
  9. Identification and Inheritance of Resistance Analysis to Fusarium Oxysporum F.sp. Niveurm in Watermelon,S436.5
  10. Study on Screening of Drought Resistant Maize and Drought Resistant Mechanism,S513
  11. The Dynamics of Sporangium of Plasmopara Viticola and Resistance of Different Grape Varieties in Shihezi Region,S436.631
  12. Chitosan-Induced Resistance of Bitter Gourd to Fusarium Wilt Disease and Its Mechanisms,S436.429
  13. Isolation and Identification of Endophytic Bacteria BEB3 for Siderophores Product from Banana and Preliminary Studies on Mechanism of Biological Control,S436.68
  14. Biological Characteristics of Cryphonectria Parasitica Causing Chestnut Blight and Screening of Resistant Chinese Chestnut Cultivars,S436.64
  15. The Preliminary Research on Pathogenesis of Fusarium Oxysporum f.sp. Cubense,S436.68
  16. Improving Effect of Actinomycetes Against the Verticillium Wilt and Fusarium Wilt by Protoplast Fusion,S476~.9
  17. Isolation and Identification of Oil Degrading Fungus, as Well as Analysis of the Oil-contaminant Degradation,X53
  18. Studies on the Identification and Control on the Pathogen of the Leaf Butt Rot of Phalaenopsis,S436.8
  19. Rice varieties resistant to rice smut smut Prevention Evaluation and Research,S435.111.41
  20. Transformation of the Green Fluorescent Protein Gene into Fusarium Oxysporum f.sp.cubense and Cloning Its Beta-Glucosidase Gene,S436.68

CLC: > Agricultural Sciences > Plant Protection > Pest and Disease Control > Horticultural Crops Pest and Disease Control > Vegetable pests > Bulb pests and diseases
© 2012 www.DissertationTopic.Net  Mobile