Realizing the Prevention and Treatment of Rice Leafhopper
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June 20 22:03:05, 2025
First and foremost, the level of occurrence shows that mid-season rice planthoppers are moderately severe, with hilly and mountainous regions experiencing significantly higher infestations compared to flatlands.
Secondly, regarding the epidemic and prevention timeline, acute symptoms began manifesting on June 25th, while the peak epidemic hit Daejeon between June 30th and July. The recommended prevention window is from June 20th to June 30th.
Thirdly, the primary factors influencing this situation include:
1. High bacterial load in fields and widespread infection: As observed by the plant protection station on June 15th, Datian predominantly showed acute symptoms. The diseased field rate reached 100%, with the disease leaf infection rate at 0.81%. Among these infected leaves, 90% were acute cases. In the hilly rice-growing areas of Premiao and Wangdian, "fire pit" plots have been identified.
2. Climatic conditions: Favorable weather, combined with dense fog in mountainous regions, facilitates the spread of pathogens, exacerbating disease outbreaks.
3. Varieties planted this year vary significantly in disease resistance, with numerous susceptible cultivars present.
4. Rice paddies are predominantly treated with inorganic fertilizers, which can lead to early and tender seedling growth, making them more vulnerable to epidemics.
Fourthly, here are some comprehensive preventive recommendations:
1. Control strategy: Focus on preventing mid-season rice planthoppers early on to minimize the risk of disease spread. Early intervention is key to managing the invasion of diseased seedlings.
2. Enhance water and nutrient management: Adopt rational fertilization practices and maintain appropriate water levels to regulate seedling growth and reduce field humidity. (Source: Hubei Dangyang Agricultural 110 Service Center)
In addition, it's crucial to monitor weather patterns closely and implement biological controls where feasible. Regular scouting and timely treatment are essential to protect crops from further damage. Farmers should also consider rotating crops and practicing integrated pest management to mitigate future risks. By taking proactive measures now, we can help safeguard rice yields and ensure food security for the upcoming season.