Kinh mong các bác cho em hỏi:
Số là cây bông trang (lá nhỏ) của em bị rệp tấn công mấy cái bông. Em muốn phun thuốc trừ rệp. Xin mọi người tư vấn dùm là em nên mua thuốc gì và phun và thời điểm nào trong ngày ạ ?. Nếu em dùng phân bón lá thì em phun vào thời điểm nào trong ngày ?. Có cần thiết phải phun thuốc và phân vào các ngày khác nhau hay không ?
Chân thành cám ơn mọi người
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mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Arial","sans-serif"; mso-ascii-font-family:Arial; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Arial; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} </style> <![endif]--> Đặc trị rệp, nhất là rệp sáp hay tấn công bông trang và sứ thái là Supracid.
Rệp sáp mang theo kiến…hai lòai này cộng sinh với nhau rất tương đắc, kiến tha rệp sáp đi nhiều nơi,, để nhân thành nhiều tổ rệp
Rệp sáp có lớp phấn bao bên ngoài nên nước và thuốc không thấm vào được. do đó để phun rệp sáp có hiệu quả bạn phải pha trong thuốc có dầu bấm dính thực vật
Supracid phun vào buổi chiều khi tắt nắng.. phun thẳng vào ổ..và phun từ dưới lên phun kĩ toàn cây kể cả gốc và chậu …1 lần 1 là khỏi…
Phân bón lá cũng phải phun vào buổi chiều khi tắt nắng..vì ban trưa sẽ không có công dụng…do không khí khô…nên các khí khổng của lá cây đóng lại..lá không hấp thụ phân. Và phân sẽ làm cháy lá do nhiệt độ và ánh sáng mặt trời tương tác vào
Buổi chiều khí hậu bắt đầu ẩm,,, các khí khổng mở ra..cây sẽ có nguyên 1 đêm để hấp thụ hết phân bám trên lá