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                            黑毛石斛的病蟲害防治

                            來源: 時間: 2019-03-31 12:54:50 人氣: 9
                             黑毛石斛的病蟲害防治
                              石斛是種常見的藥材,但黑毛石斛主要具觀賞性,多生長在高海拔地區,喜歡半陰半陽溫暖濕潤的環境。黑毛石斛莖是圓柱形的,有時也會腫大變成紡錘形,有數節而沒有分枝,干后變為金黃色。黑毛石斛的葉子都互生在莖的上端,和莖干粘連的地方密布黑色粗毛。每年的4-5月是黑毛石斛的花期,黑毛石斛的花非常美麗,觀賞性很高,下面主要講下黑毛石斛如何防治病蟲害。
                              一、黑斑病
                              剛長黑斑病的時候葉子會有黑褐色的斑點,斑點周圍為黃色,然后慢慢蔓延到整片葉子,最后葉子會枯萎掉落。每年的3-5月是此病的高發期,可以噴灑波爾多液或者多靈液預防此病和控制其發展。
                              二、蝸牛
                              蝸牛喜歡吃黑毛石斛的葉子和莖,危害特別大,常常會把整個植株吃得一塌糊涂。平時要注意打掃枯枝敗葉,保持干凈衛生。可以用麩皮拌敵百蟲放在蝸牛經常出沒的地方投毒誘殺,也可以在栽種場地直接噴灑敵百蟲等農藥或者生石灰和鹽水。
                              三、炭疽病
                              風雨能使炭疽病傳播,通常它會以黑毛石斛的傷口侵入,所以此病一般發生在雨水多的時候。發病初期,黑毛石斛的莖葉會長出黑色的圓形小點,慢慢的小黑點上會出現桃紅色的黏狀物,最后葉子枯萎掉落。每年冬天及時清掃落葉枯枝,防止病菌貯藏過冬,噴灑多菌靈或甲基托布津。
                              四、煤污病
                              每年的3-5月也是煤污病的發病期,顧名思義發生此病蟲害的時候,所有葉片表面都會蒙上一層像煤煙灰一樣的黑色粉末,影響葉子的光合作用。防治辦法:用多菌靈或樂果乳稀釋噴灑。
                              五、菲盾蚧
                              菲盾蚧是一種常見的寄生蟲,它常常會躲在黑毛石斛的葉子背面或邊緣吸取葉汁,造成黑毛石斛葉子的枯萎掉落,沒有控制好還會造成黑毛石斛的枯黃死亡,同時還會引發煤污病。在菲盾蚧長成殼后但數量不是很多的情況下,可以剪去已被病蟲害的枝葉一起燒掉或者直接把它們捏死。5月的下旬是此蟲的孵化期,當害蟲數量多的時候可以噴灑樂果乳油或石硫合劑。
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