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LEM LÉP HẠT TRÊN LÚA VÀ THUỐC ĐẶC TRỊ HÀNG ĐẦU THẦN ĐÈN DIỆT KHUẨN – huynguyenagri.com

lem lép hạt trên lúa
Xin cảm ơn!

LEM LÉP HẠT

 Nguyên nhân

– Do nhện gié: nhện gié thường sống trong các bẹ lá lúa. Khi mật độ cao chúng có thể bò lên trên bông lúa chích hút các gié lúa đang phát triển. Các bông lúa bị hại thường mọc thẳng đứng và phần lớn số hạt đều bị lép.

– Do vi khuẩn Pseudomonas glumae (hay Bukhoderia glumae), vi khuẩn này làm thối đen hạt hoặc gây vết bệnh trên vỏ hạt.

– Do nấm, có rất nhiều loại nấm gây hại (tập đoàn nấm): Alternaria padwickiiBipolaris oryzaeFusarium sp., Curvularia lunataMicrodochium oryzaePhoma sp, Pyricularia oryzaeSarocladium oryzaeSeptoria sp., Tilletia barclayanaUstilagonoides virens…Theo thống kê hiện nay có đến 12 loại nấm khác nhau gây nên loại bệnh này và đây chính là nguyên nhân gây lem lép hạt quan trọng nhất.

TRIỆU CHỨNG BỆNH GÂY HẠI

Bệnh lem lép hạt lúa do 13 -14 loài nấm và 3 – 4 loài vi khuẩn gây ra.

Khi bị bệnh, hạt lúa có gạo bị lem (lửng) và hạt lúa không có gạo bị lép hoàn toàn (lép), vỏ trấu của hạt bệnh có màu xanh nhạt rồi chuyển màu vàng hoặc các vết đốm có màu nâu, nâu sậm hoặc biến đổi từ màu nâu đến lốm đốm đen trên hạt lúa. Các triệu chứng tùy thuộc tác nhân:

  • Lem lép do nấm (lép đen): Các nấm gây hại trên hạt có vết màu tím đến tím sậm, màu nâu nhạt đến sậm. Khi độ ẩm không khí cao, bên ngoài các màu sắc này có lớp phấn trắng bao phủ ở trên.

Hạt lúa bị lem lép do nấm

  • Lem lép do vi khuẩn (lép vàng): Khi lúa trổ, vỏ trấu mở ra, vi khuẩn sẽ tấn công vào bên trong hạt lúa. Những nhánh gié có hạt lúa nhiễm bệnh không thụ phấn được hạt sẽ bị lép, vỏ trấu không biến màu hoặc có màu vàng, xanh nhạt. Khi hạt vào chắc, các nhánh không bị bệnh, hạt nặng oằn xuống, còn các nhánh bệnh nhẹ hơn đứng thẳng, bà con thường gọi là “bắn máy bay”. Bệnh gây hại một vài nhánh gié của gié lúa, bệnh nặng làm cả gié lúa bị lép. Khi tách vỏ trấu của hạt bị bệnh sẽ thấy phôi nhũ bị thối không vào hạt gạo được.

THẦN ĐÈN DIỆT KHUẨN GÓI 200GR – ĐẶC TRỊ BỆNH LEM LÉP HẠT TRÊN LÚA

THẦN ĐÈN DIỆT KHUẨN

Thành phần:

Kasugamycin 1g/kg

Streptomycin sulfate 100g/kg

Phụ gia vừa đủ 1kg

Công dụng:

lem lép hạt trên lúa

Hoạt chất Streptomycin sulfate và Kasugamycin là thuốc trừ bệnh cao cấp có tác dụng nội hập mạnh.

Phòng trừ hiệu quả các bệnh do nấm và vi khuẩn gây hại cây trồng: Nhóm Bầu Bí, Xoài, Cam, Quýt, Chanh, Leo, Hồ tiêu, cà phê, ca cao,…

Lúa: bạc lá (cháy bìa lá)

Bắp cải, cà chua, hành lá: lở cổ rễ, héo xanh vi khuẩn, thán thư, thối nhũn.

Hướng dẫn sử dụng:

Bầu, bí: cháy lá, nổ lá: 0.1 – 0.2 kg/ha . Lượng nước 400 – 500 lít/ha. Phun thuốc khi tỷ lệ bệnh khoảng 3-8%

Ớt: Thán thư: 0.1 – 0.2 kg/ha . Lượng nước 400 – 500 lít/ha. Phun thuốc khi tỷ lệ bệnh khoảng 3-8%

Hành: Thối nhũn: 0.1 – 0.2 kg/ha. Lượng nước 400 – 500 lít/ha. Phun thuốc khi tỷ lệ bệnh khoảng 3-8%

Cà chua: Héo xanh vi khuẩn: 0.1 – 0.2 kg/ha. Lượng nước 400 – 500 lít/ha. Phun thuốc khi bệnh xuất hiện.

Lúa: Bạc lá: 0.1 – 0.2 kg/ha. Lượng nước 400 – 500 lít/ha. Phun thuốc khi tỷ lệ bệnh khoảng 5-10%

Bắp cải: Lở cổ rễ : 0.2kg/ha. Lượng nước 400 – 500 lít/ha. Phun thuốc khi tỷ lệ bệnh khoảng 5-10%.

Đối với Cây ăn trái : Thán thư, nấm trái, thối cuống…phun thuốc khi bệnh xuất hiện.

Cách pha: Pha 20-25g cho bình 25 lít, 200g/phuy 200 lít.
Thời gian cách ly: 7 ngày

CHÚC CÁC BẠN THÀNH CÔNG

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CÔNG TY TNHH VTNN VIỆT NAM NÔNG NGHIỆP SẠCH
Địa chỉ: Đường Nguyễn Trãi, Khu Dân Cư 4, Khu Phố Hiệp Tâm 2, Thị Trấn Định Quán, Huyện Định Quán, tỉnh Đồng Nai.
Chuyên Thuốc bvtv _ hạt giống_ dụng cụ nông nghiệp
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==> XEM THÊM BÀI VIẾT:

THUỐC TRỪ BỆNH – ATT ROOTS Giá 220k – ĐẶC TRỊ BỆNH THỐI RỄ 200GR – AGRI THUẬN THIÊN cuahangphanthuoc.org

ANTI – VIRUS ATT – KHÔNG LO VỀ VIRUS HẠI CÂY TRỒNG CHAI 200ML Giá 180k – AGRI THUẬN THIÊN cuahangphanthuoc.org

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