Preliminary Study on Early Diagnosis and Rehabilitation Treatment of Pine Wood Nematode Disease Based on Partial Symptoms
Abstract
:1. Introduction
2. Materials and Methods
2.1. Experimental Sample Sites and Materials
2.2. Selection of Diseased Pine Trees
2.3. Morphological Identification of B. xylophilus
2.4. Molecular Detection of B. xylophilus
2.5. Medication Treatment
2.6. Accuracy of Initial Diagnosis
2.7. Detection of Pesticide Residues
2.8. Data Processing
3. Results
3.1. Observation of External Symptoms in the Early Stage of Infection and Division of the Stage of Infection
3.2. The Diagnostic Accuracy at Different Stages of PWD
3.3. The Effect of Pharmaceutical Treatment at Different Stages of PWD
3.4. Residual Analysis of Drug in Pine Trees One Year after Injection of Emamectin Benzoate into Diseased Pine Trees in 2021
4. Discussion
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Stages of Disease | External Symptoms | Condition of Resin |
---|---|---|
Early stage I | maturation feeding evident on twigs, no needle discolouration | ++++ |
Early stage II | maturation feeding evident on twigs, Slight discolouration of needles | +++ |
Middle stage I | maturation feeding evident on twigs, Single twig wilting | + |
Middle stage II | Needle wilt less than 50%, a few oviposition scars | - |
Late stage | Needle wilt greater than 50% or whole plant discolouration or many Monochamus oviposition scars | - |
Stages of Disease | Suspected Infected Trees in 21 Years | Infected Trees in 21 Years | Suspected Infected Trees in 22 Years | Infected Trees in 22 Years |
---|---|---|---|---|
Early stage I | 24 | 4 | 25 | 6 |
Early stage II | 3 | 2 | 2 | 2 |
Middle stage I | 1 | 1 | 1 | 1 |
Middle stage II | 7 | 6 | 4 | 3 |
Late stage | 0 | 0 | 4 | 4 |
Total | 35 | 13 | 36 | 16 |
Stages of Disease | Suspected Infected Trees | Confirmed Infected Trees | Accuracy of Initial Diagnosis (%) |
---|---|---|---|
Early stage I | 49 | 10 | 20.4 |
Early stage II | 5 | 4 | 80.0 |
Middle stage | 13 | 11 | 84.6 |
Late stage | 4 | 4 | 100.0 |
Injection Dose/mL | July August 2021 | July August 2022 | |||
---|---|---|---|---|---|
Early Stage | Middle Stage | Early Stage | Middle Stage | Late Stage | |
20 | 0 | 2 | 0 | 0 | 4 |
15 | 0 | 0 | 0 | 4 | 0 |
10 | 5 | 3 | 0 | 0 | 0 |
5 | 0 | 0 | 7 | 0 | 0 |
0 (CK) | 1 | 2 | 1 | 0 | 0 |
Stage of Infection | Therapeutic Effect | χ2 | p Value | |
---|---|---|---|---|
Effective | Ineffective | |||
Early stage | 12 | 0 | 21.439 | p < 0.001 |
Middle stage | 1 | 8 | ||
Late stage | 0 | 4 |
Injection Dose (mL) | Pesticide Residue (mg/kg) | Mean (mg/kg) | Standard Deviation | Coefficient of Variation/% | ||
---|---|---|---|---|---|---|
20 | 0.181 | 0.176 | 0.183 | 0.180 | 0.004 | 2.175 |
10 | 0.060 | 0.058 | 0.062 | 0.060 | 0.002 | 3.975 |
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Ni, A.; Yang, D.; Cheng, H.; Ye, J. Preliminary Study on Early Diagnosis and Rehabilitation Treatment of Pine Wood Nematode Disease Based on Partial Symptoms. Forests 2023, 14, 657. https://doi.org/10.3390/f14040657
Ni A, Yang D, Cheng H, Ye J. Preliminary Study on Early Diagnosis and Rehabilitation Treatment of Pine Wood Nematode Disease Based on Partial Symptoms. Forests. 2023; 14(4):657. https://doi.org/10.3390/f14040657
Chicago/Turabian StyleNi, Anshun, Dan Yang, Hao Cheng, and Jianren Ye. 2023. "Preliminary Study on Early Diagnosis and Rehabilitation Treatment of Pine Wood Nematode Disease Based on Partial Symptoms" Forests 14, no. 4: 657. https://doi.org/10.3390/f14040657
APA StyleNi, A., Yang, D., Cheng, H., & Ye, J. (2023). Preliminary Study on Early Diagnosis and Rehabilitation Treatment of Pine Wood Nematode Disease Based on Partial Symptoms. Forests, 14(4), 657. https://doi.org/10.3390/f14040657