निम्नलिखित में से किस पौधे में राइजोबियम (Rhizobium) जीवाणु द्वारा जड़ ग्रंथियों (Root nodules) का निर्माण नहीं होता है?

Which of the following organisms is responsible for the production of toxic aflatoxins in peanuts?

The destructive plant disease known as 'Citrus Canker' is caused by which organism?

'Leaf curl of papaya' disease is caused by which type of pathogen?