Agricultural Entomology - Study Mode

[#91] Melathion belongs to the group of
Correct Answer

(C) Orangophosphide

Explanation

Solution: Melathion belongs to the group of Orangophosphide. Malathion is an organophosphate insecticide that acts as an acetylcholinesterase inhibitor. It is a pesticide that is widely used in agriculture, residential landscaping, public recreation areas, and in public health pest control programs such as mosquito eradication. Malathion is produced by the addition of dimethyl dithiophosphoric acid to diethyl maleate or diethyl fumarate.

[#92] The damaging stage of white grub is
Correct Answer

(B) Grub and adult

Explanation

Solution: Understanding White Grub Damage Let's break down why the correct answer is (C) Larva. White Grubs: The Basics White grubs are the larvae of scarab beetles. Think of a beetle's life cycle: egg -> larva -> pupa -> adult. Why Larva is the Damaging Stage The larval stage (grub) is when they live in the soil and feed on plant roots. This feeding is what causes the significant damage to crops and lawns. Why Other Options Are Incorrect * Option A: Nymph and adult: Insects do not have nymph stage. * Option B: Grub and adult: While adults might feed a little, their feeding is minimal compared to the grubs. The grub stage is the primary damaging stage. * Option D: Only adult: The adults of some scarab beetles may cause minor damage by feeding on foliage. The real problem is the grubs feeding on roots. Therefore, the answer is (C) Larva because the larva (grub) is the stage that causes the most significant damage by feeding on plant roots.

[#93] The optimum moisture content required for storage of food grain is
Correct Answer

(B) 10%

Explanation

Solution: The optimum moisture content required for the storage of food grain is 10%. Dried to the safe storage moisture level of 10 - 12% for food grains and 7 - 9% for oil seeds (on a wet basis) for a safe storage period of 6 - 12 months. Grains are stored in defined units such as bags, silos, warehouses, containers and even in piles on the ground.

[#94] Central Insecticides Laboratory (CIL) is located at
Correct Answer

(B) Faridabad

Explanation

Solution: Central Insecticides Laboratory (CIL) is located in Faridabad. Pesticides are indispensable inputs for sustaining the agricultural production of the country. The Central and State Governments have endeavored to ensure the availability of quality pesticides to the farming community. The Central Insecticide Laboratory (CIL) was established under section 16 of the Insecticides Act, 1968 on 28 th February 1981, by Gazette Notification. This Laboratory is a referral Laboratory that analyzes Pesticides Samples received from different Courts of Law/Govt. authority under Insecticides Act, 1968 and Insecticides Rules, 1971.

[#95] The insecticide which is being opposed by environmentalist is
Correct Answer

(D) Endosulphan

Explanation

Solution: The insecticide which is being opposed by environmentalists is Endosulphan. Endosulfan is an off-patent organochlorine insecticide and acaricide that is being phased out globally. It became a highly controversial agrichemical due to its acute toxicity, the potential for bioaccumulation, and role as an endocrine disruptor. Because of its threats to human health and the environment, a global ban on the manufacture and use of endosulfan was negotiated under the Stockholm Convention in April 2011.