Question
Consider the following statements regarding pest
management in rice and choose correct options- (A). ETL for rice earhead bug in milky stage is 109 bugs/hill. (B). Use of synthetic pyrethroids may cause resurgence of sucking pest in rice (C). Tip drying and orange discoloration of rice leaves is a typical symptom of Recilia dorsalis (D). Alternate wetting and drying is a good management technique for controlling B.PH. in rice. Choose the correct answer from the options given below:Solution
(A) The specified ETL (Economic Threshold Level) may not be correct for rice earhead bug in milky stage. (B) Using synthetic pyrethroids can indeed cause a resurgence of sucking pests due to their broad-spectrum action, which may kill beneficial insects that control sucking pests. (C) Tip drying and orange discoloration of rice leaves are symptoms associated with Recilia dorsalis, an insect pest. (D) Alternate wetting and drying is a water management technique that can help control bacterial panicle blight (B.PH.) in rice by managing moisture levels conducive to disease development.
2,0, 9, 20, ‘?’, 714
7, 14, 42, 210, 1470, ?
6000 3002 1503 ? 378.75 191.375 97.6875
...41 48 89 137 226 ?
...31   48    67    90   ?      150
640 320 160 ? 40 20
Find the 31st term of the series 25, 29, 33……
140Â Â Â Â 300Â Â Â Â 380Â Â Â Â Â 420Â Â Â Â Â 440Â Â Â Â Â ?
...504 625 769 938 1134 ?
...14 26 50 98 194 ?
...
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