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21. |
Injuries by insects is / are : |
A. |
An essential part of the forest ecosystem |
B. |
Some are beneficial; quite a few are serious pests of trees and wood products |
C. |
Tonica inviferana, a semal shoot borer, Ascotis imparata, |
D. |
A bakain defoliator and Margaronia phloalis a defoliator of mulberry are serious pests of other tree species grown in forest plantations |
E. |
All of the above |
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Answer: Option E
Explanation:
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22. |
Injuries by diseases is / are: |
A. |
Throughout their life |
B. |
Seeds decay and seedlings are killed by damping-off |
C. |
Generally serious in the coniferous nurseries |
D. |
All of the above |
Answer: Option D
Explanation:
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23. |
Insects and disease of poplars/are: |
A. |
Like every other plant |
B. |
Also susceptible to may diseases and damages by bacteria, fungi, insects and wild animals |
C. |
Almost all parts of the tree i.e., stem, leaves, branches and roots etc., are affected by one disease of the other. |
D. |
Poplars have met quite of few other adversaries in different parts of Pakistan |
E. |
All of the above |
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Answer: Option E
Explanation:
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24. |
Gypsonoma bapalosarca Meyr. (Tortricidae-Lepidopaters) is / are: |
A. |
The larvae stituch two or more leaves together and feed in between |
B. |
The distribution is countrywide. |
C. |
The pest has 7 generations in a year |
D. |
It hibernates in winter as pupae and become active again in April/May |
E. |
All of the above |
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Answer: Option E
Explanation:
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25. |
Cerura wisei Swin control is: |
A. |
Spraying of nurseries and younger poplar plantations with 2lbs. Of Sevin 85% S.P. In 100 gallons of water per acre |
B. |
Spraying of nurseries and younger poplar plantations with 1 lbs of Sevin 75% S.P. In 50 gallons of water per acre |
C. |
Spraying of nurseries and younger poplar plantations with 2 lbs of Sevin 95% S.P. In 200 gallons of water per acre |
D. |
None of these |
Answer: Option A
Explanation:
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26. |
Sarrothripus diplographa Hams: (Notuidae - Lepidoptera) control is: |
A. |
Spray dimecorn in the does of 0.05% or at the rate of 1 lb in 200 gallons of water |
B. |
Spray dimecorn in the does of 0.04% or at the rate of 1 lb in 300 gallons of water |
C. |
Spray dimecorn in the does of 0.03% or at the rate of 1 lb in 100 gallons of water |
D. |
None of these |
Answer: Option A
Explanation:
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27. |
Plagiologera versicolor Laich: (Chrysomelidae - Coleoptera) control is: |
A. |
Sparay Sevin 85% in the dose of 0.1% |
B. |
Sparay Sevin 75% in the dose of 0.1% |
C. |
Sparay Sevin 65% in the dose of 0.1% |
D. |
None of these |
Answer: Option A
Explanation:
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28. |
Melanophila picta Pall: (Burpreastidae - Coleoptera) is / are: |
A. |
This is flat headed stem borer |
B. |
The grubs are white and not more than 2.3 cm in length |
C. |
Both (a) & (b) |
D. |
None of these |
Answer: Option C
Explanation:
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29. |
Aleolesthes berta Solbky: (Cerambyycidae - Celeoptera) is / are: |
A. |
Stem borer of serious nature |
B. |
It is found in KPK, Boluchistan and some parts of Punjab |
C. |
The galleries run under the bark |
D. |
All of the above |
Answer: Option D
Explanation:
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30. |
Apriona cinerea Cher: (Lamidae-Coleoptera) is / are: |
A. |
The pith borer of poplars |
B. |
Mostly found in KPK, Azad Kashmir and Lahore |
C. |
The eggs are laid in eye-shaped slits made in young branches by ovipositing adult |
D. |
All of the above |
Answer: Option D
Explanation:
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