Indian Forest Service Examination (IFoS) — Forestry optional · India · Union Public Service Commission
Original practice questions written to the published syllabus · not past papersDiseases of forest trees, nursery stock and wood: fungal, bacterial, viral and phytoplasma pathogens, root rots, wilts, rusts and decay, and their management.
In the exams: ICAR AIEEA-PG Group 09 (tree diseases, wood decay and discolouration, integrated disease management); IFoS Forestry Paper II Section B; Korea Forestry Engineer written subject Forest Protection
How our questions for Indian Forest Service Examination spread across the units of Forest Pathology & Wood Decay. Difficulty: 6 easy, 26 medium, 13 hard.
| Root and butt rots | 5 | |
| Wilts and cankers | 5 | |
| Rusts and other foliar diseases | 5 | |
| Wood decay: white rot, brown rot, soft rot; discolouration and sapstain | 5 | |
| Concepts of disease, pathogen and disease triangle | 4 | |
| Phytoplasma diseases (e.g. sandal spike) | 4 | |
| Integrated disease management and forest health monitoring | 4 | |
| Invasive forest pathogens and plant health regulation | 4 | |
| Nursery diseases: damping-off, leaf spots, blights | 3 | |
| Mistletoes and parasitic plants | 3 | |
| Abiotic damage: frost, drought, pollution, wind | 3 |
Choose an answer, then open the working. Each explanation says why the right answer is right and why the others are not.
Which of these is an abiotic (non-infectious) disease agent?
D. Frost
Frost, drought, pollution and nutrient deficiency are abiotic and do not spread.
Polycyclic diseases are dangerous mainly because they:
D. Complete several infection cycles in one season
Repeated cycles let inoculum multiply and spread rapidly within a season.
Seedlings become resistant to damping-off mainly when:
A. Their stems become woody
Susceptibility lasts until stems lignify; high nitrogen, wetness, shade and density all increase risk.
Why are mixed-species stands less affected by some root rots?
C. Host-specific pathogens spread poorly between non-host trees
Non-host neighbours break chains of root contact for host-specific pathogens.
Pine wilt disease is caused by:
B. A nematode, Bursaphelenchus xylophilus
The pine wood nematode is vectored by Monochamus sawyer beetles.
Phytoplasmas are insensitive to penicillin because they:
D. Lack a cell wall
Penicillin targets cell-wall synthesis; tetracyclines can suppress phytoplasmas.
The practical management of sandal spike relies on:
C. Early removal of affected trees and healthy planting stock
There is no practical cure; antibiotics give only temporary remission.
Phyllody, a phytoplasma symptom, means:
B. Transformation of flower parts into leafy structures
Hormonal disturbance converts floral organs into leaves.
White rot fungi differ from brown rot fungi in that they:
B. Degrade lignin as well as cellulose
White rot leaves bleached, stringy wood; brown rot leaves lignin.
Phytophthora ramorum is known for causing:
D. Sudden oak death in California and larch mortality in Britain
It is an invasive oomycete with a wide host range.
Ten here, 45 in the app. The Laisha app has every practice question we have written to Indian Forest Service Examination in this subject, marked as you go, with timed papers, a jump-to-unanswered list and a certificate when you pass at 70 per cent.
Free for ten days, then one subscription of US$10 a month. We would rather say so here than have you find it later.
An AI operating system for agriculture: free guides, manuals and tools written for every country.