Range Forest Officer recruitment (state exams) · India · State Public Service Commissions and state forest departments (e.g. MPPSC, UKPSC, UPPSC)
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 Range Forest Officer recruitment spread across the units of Forest Pathology & Wood Decay. Difficulty: 16 easy, 21 medium, 0 hard.
| Nursery diseases: damping-off, leaf spots, blights | 5 | |
| Concepts of disease, pathogen and disease triangle | 4 | |
| Wilts and cankers | 4 | |
| Root and butt rots | 3 | |
| Rusts and other foliar diseases | 3 | |
| Phytoplasma diseases (e.g. sandal spike) | 3 | |
| Mistletoes and parasitic plants | 3 | |
| Wood decay: white rot, brown rot, soft rot; discolouration and sapstain | 3 | |
| Abiotic damage: frost, drought, pollution, wind | 3 | |
| Integrated disease management and forest health monitoring | 3 | |
| Invasive forest pathogens and plant health regulation | 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.
Damping-off of nursery seedlings is caused mainly by:
D. Pythium, Phytophthora, Rhizoctonia and Fusarium
These soil-borne organisms attack seeds and young stems.
Which genus produces bracket fruiting bodies at the base of trees with root rot in tropical plantations?
D. Ganoderma
Ganoderma root rots affect acacias, rubber and other tropical trees.
Dutch elm disease is spread mainly by:
D. Elm bark beetles
Scolytus beetles carry Ophiostoma spores to healthy elms; root grafts also spread it.
Pine wilt disease is caused by:
B. A nematode, Bursaphelenchus xylophilus
The pine wood nematode is vectored by Monochamus sawyer beetles.
Teak leaf rust is caused by:
D. Olivea tectonae
It forms orange-yellow pustules on teak leaf undersides.
A heteroecious rust fungus:
A. Needs two unrelated hosts to complete its life cycle
Autoecious rusts complete the cycle on one host.
Ozone injury on broadleaves typically appears as:
D. Stippling on the upper leaf surface
Ozone causes upper-surface flecking and reduces growth.
Sunscald occurs on thin-barked trees when:
D. Stems are suddenly exposed to strong sun by felling or pruning
Exposed bark overheats and dies on the sun-facing side.
Long-term responses to an established invasive pathogen include:
D. Breeding resistant trees and changing species choice
Resistance breeding programmes exist for elms, chestnuts and ash.
Ten here, 37 in the app. The Laisha app has every practice question we have written to Range Forest Officer recruitment 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.
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