#320.
If Sevin 50 WP is recommended for leafhopper control at the rate of 100 gm Sevin 50 WP per 100 li of water, what is the concentration or strength of the finished spray in ppm?
A
100
B
1000
C
500
D
5000
Answer: 500
#321.
Given the application rate of 100 gm Sevin 50WP per 100 liters of water, what is the concentration or strength of the finished spray in percent a.i.?
A
0.01
B
0.10
C
0.05
D
0.005
Answer: 0.05
#322.
The interaction between two organisms where one party is benefited while the other is adversely affected is called.
A
Competition
B
Parasitism
C
Amensalism
D
Mutualism
Answer: Parasitism
#323.
A type of cultural practice which tend to reduce both the initial pest population or sources of infestation and reproductive ability of the pests.
A
Crop rotation
B
Pruning
C
Tillage
D
Furrowing
Answer: Pruning
#324.
The principle of immunization is achieved through
A
Providing chemical or physical barrier
B
Application of pesticides
C
Improving the nutrition of the host
D
Pruning infected plant parts
Answer: Improving the nutrition of the host
#325.
The discovery of DDT is considered as one of the major events in the history of crop protection. When was DDT discovered?
A
1959
B
1937
C
1935
D
1939
Answer: 1939
#326.
It is considered as pest of quarantine interest in Palawan.
A
Mango seed weevil
B
Mango pulp weevil
C
Mango weevil
D
Asiatic palm weevil
Answer: Mango pulp weevil
#327.
A rite traditionally performed by the Romans to appease the goddess associated with cereal rust disease is