琯溪蜜柚黑斑病(pomelo black spot)的病原菌为亚洲柑橘叶点霉Phyllosticta citriasiana。田间系统观察和病原菌侵染试验结果表明,蜜柚黑斑病是一种潜伏侵染病害,上年度被侵染的带菌叶片为次年病害的侵染源,蜜柚花期至幼果期是病菌侵染...琯溪蜜柚黑斑病(pomelo black spot)的病原菌为亚洲柑橘叶点霉Phyllosticta citriasiana。田间系统观察和病原菌侵染试验结果表明,蜜柚黑斑病是一种潜伏侵染病害,上年度被侵染的带菌叶片为次年病害的侵染源,蜜柚花期至幼果期是病菌侵染盛期和病害防治适期。如果错过这两个时期,将难以达到理想的防治效果。展开更多
In this paper we consider the extreme points of closed convex hull of the class T σ(p,α) and then it is used to determine the coefficient bounds. Some other interesting properties of the class T σ(p,α) are also...In this paper we consider the extreme points of closed convex hull of the class T σ(p,α) and then it is used to determine the coefficient bounds. Some other interesting properties of the class T σ(p,α) are also investigated.展开更多
文摘琯溪蜜柚黑斑病(pomelo black spot)的病原菌为亚洲柑橘叶点霉Phyllosticta citriasiana。田间系统观察和病原菌侵染试验结果表明,蜜柚黑斑病是一种潜伏侵染病害,上年度被侵染的带菌叶片为次年病害的侵染源,蜜柚花期至幼果期是病菌侵染盛期和病害防治适期。如果错过这两个时期,将难以达到理想的防治效果。
文摘In this paper we consider the extreme points of closed convex hull of the class T σ(p,α) and then it is used to determine the coefficient bounds. Some other interesting properties of the class T σ(p,α) are also investigated.
