1. Little leaf of Citrus is caused by
- Zinc (Zn) deficiency
2. Die back of shoots occur due to the deficiency of
- Copper(Cu)
- other important deficiency symptom: reclamation disease in cereals and leguminous crops
3.Very dangerous disease of sugarcane is
- Red rot (causative organism: Colletotrichum falcatum)
4.Phyllody disease in Til is caused by
- Mycoplasma
5. Bunchy top of banana is caused by
- Virus
6.Heart rot of sugarbeet is caused by the deficiency of
- Boron
7. Top sickness of tabacco is due to the deficiency of
- Boron
8. Club rot of cauliflower is caused by
- Plasmodiosphora brassicae
9. Late blight of potato is potato is caused by
- Late blight of potato: Phytopthora infestans (reason for potato famine)
- Early blight of potato: Alternaria solani
- Black scurf of potato: Rhizoctonia solani
- Wart diseases of potato: Synchytrium endobioticum
10. Akiochi disease is due to
- Sulphur toxicity
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11. Whiptail in cauliflower is due to the deficiency of
- Molybdenum
12. Ufra disease in rice is caused by
- Nematode (Ditylenchus sp)
13. Mantek disease of rice is caused by
- Rice root nematode
14. Exanthema in citrus is due to
- Deficiency of Copper
15. The Pahala blight of sugarcane is due to the deficiency of
- Maganese(Mn)
16.Wart disease of Potato is caused by
- Synchitrien endobioticum
- Phytophothora infestans (Late Blight of potato)
18. White rust of cruifers is caused by
- Albugo candida, fungi
19. White rust of crucifers caused Albugo candida belongs to class
- Oomycetes
20. The pathogen associated with the discovery of Bordeaux mixture is
- Plasmosphora viticola
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