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ধানের কাণ্ড পঁচারোগ সৃষ্টিকারী ছত্রাকের নাম কি?

Phytophthora infestens

Helminthosporium oryzae

Helmintosporium singmoideum

Penicillium digitatum

ANSWER : 3

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ধানের কাণ্ড পঁচারোগ &nbsp;<figure class="image image_resized" style="width:119px;"><img 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" alt="Image result for ধানের কাণ্ড পচা রোগ"></figure>উপসর্গ ধান গাছের কুশি ছাড়ার পরে সাধারণত এ রোগের লক্ষণ দেখা দেয়। রোগের প্রাথমিক লক্ষণ হচ্ছে, জলের কাছাকাছি পাতার বাইরের খোলে অনিয়মিত ছোট, কালো ক্ষত দেখা যায়। রোগের প্রকোপ যত বৃদ্ধি পায়, ক্ষত তত বাড়তে থাকে, পাতার ভেতরের খোলে এবং কাণ্ডে ক্ষত ছড়ায়, যা বাদামী- কালো ক্ষত তৈরি করে।

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