Group 1: Pest Control Industry - The pest control concept saw significant strength in the morning, with the sector index rising over 3%, reaching a two-year high [2] - Major companies like Su Li Co., Longqing Co., and Guangkang Biochemical experienced notable stock price increases, with Su Li Co. hitting the limit up for the second consecutive day [2] - The National Agricultural Technology Center predicts a resurgence of 23 major pests affecting key crops by 2025, with an expected affected area of 2.518 billion acres, a 6.2% increase from 2024 [4] Group 2: Glyphosate and Agricultural Chemicals - The glyphosate industry is undergoing a supply-demand restructuring, with domestic companies likely to leverage cost advantages [5] - Related sectors such as agricultural chemicals and fertilizers also showed strength, with companies like Shenda Co. and Lier Chemical seeing significant stock price increases [4] Group 3: Precious Metals Market - The precious metals sector, particularly silver, saw a collective surge, with the sector index rising over 2% [6] - Domestic silver futures experienced a significant increase, breaking multiple price thresholds and reaching a historical high [7] - The market's risk aversion, driven by geopolitical uncertainties, has led to increased purchases of gold and silver, with gold prices rising 42% over the past year and silver lagging at 15% [8][9] Group 4: Silver Demand and Supply Dynamics - The silver market is facing a supply-demand gap, with global silver demand projected to reach 36,700 tons against a supply of 31,700 tons in 2024, resulting in a shortfall of 5,000 tons [11] - The photovoltaic industry is a key driver of silver demand, with industrial silver usage exceeding 40%, and the transition to N-type solar cells increasing silver consumption by 40%-100% per unit [11] - Citic Securities anticipates a long-term supply shortage in the silver market, suggesting that the correlation between silver prices and supply-demand dynamics may strengthen in the future [11]

又见闪崩。 A股市场窄幅震荡 A股市场今天(6月5日)上午窄幅震荡，主要指数和板块多数波动不大。港股整体继续上涨，恒生指数盘中涨幅一度超过1%。 异动个股方面，港股中华银科技放量闪崩，股价跌超80%。该股此前在不到一个月的时间里股价飙升超4倍。 新股优优绿能（301590）盘中涨幅一度达到99.64%。 招股资料显示，优优绿能是专业从事新能源汽车直流充电设备核心部件研发、生产和销售的国家高新技术企业，主要产品为15KW、20KW、30KW和 40KW充电模块，主要应用于直流充电桩、充电柜等新能源汽车直流充电设备。公司着眼于新能源汽车对充电速率、环保性、便利性、安全性、可靠性的 核心需求，产品始终沿着大功率、高效率、高功率密度、宽电压范围、高防护性的技术发展路线，可批量供应最大功率为40KW、最高转换效率为96%、 最高功率密度为60W/in3、恒功率输出电压范围为300V至1000V的充电模块，以及防护等级为IP65的充电模块，助力新能源汽车实现快速、环保、安全、 便捷的电力补能，间接推动新能源汽车充换电领域的快速发展。 A股市场今天上午整体窄幅震荡，主要指数波动均不大。 | 行情 | 资金净流入 | 涨跌分 ...

原标题：科技守护城市树木健康 "以往，物理防治方法和生物防治方法多用于大型果园或农田的病虫害防治，现在被逐步应用在城 市树木上。"甘丽萍介绍道，除了缠"黄腰带"，黑光灯诱捕法、性激素诱捕法等物理防治方法也被用于 城市绿化病虫害防治。 黑光灯诱捕法利用害虫的趋光性，在树上安装黑光灯，通过发射特定波长的紫外线吸引害虫，再结 合物理装置实现诱捕。性激素诱捕法则通过在树上悬挂涂有性激素的诱捕器，吸引雄性害虫以达到杀虫 目的。 甘丽萍补充道，生物防治方法也是绿色防治害虫的方式之一，即采取以虫治虫、以鸟治虫、以菌治 虫和以植物治虫等方式，用一种生物去对付另外一种生物。 以虫治虫是较为常见的生物防治方法。防治人员会利用寄生蜂的寄生特性来控制害虫数量。例如， 中红侧沟茧蜂等寄生蜂会将卵产在害虫棉铃虫体内。当寄生蜂的卵孵化后，幼虫会以棉铃虫的组织为 食，致使棉铃虫生长发育受阻甚至死亡，从而达到防治害虫的目的。 最近，北京、上海等城市部分路边的树木缠上了"黄腰带"——新型防虫胶带。那么，"黄腰带"防病 虫害效果如何？它的防治原理是什么？除了"黄腰带"还有哪些虫害防治手段？科技日报记者日前就此采 访了重庆三峡学院生物与食品工程学院 ...