Agricultural Entomology - Study Mode

[#466] In honey bee pollen basket is present in
Correct Answer

(B) Hindleg

Explanation

Solution: In honey bee pollen basket is present in Hindleg. The pollen basket or corbicula is part of the tibia on the hind legs of certain species of bees. They use the structure in harvesting pollen and carrying it to the nest or hive. The pollen is transferred to the pollen comb on the hind legs and then combed, pressed, compacted, and transferred to the corbicula on the outside surface of the tibia of the hind legs.

[#467] Type of oesophagus, where basal bulb has a refractive valve is
Correct Answer

(D) Rhabditoid type

Explanation

Solution: Type of oesophagus, where basal bulb has a refractive valve is Rhabditoid type. Esophagus rhabditoid with metacorpus slightly swollen, narrow isthmus surrounded by nerve ring, and large basal bulb with reduced valve. Esophago-intestinal valve is usually pronounced.

[#468] Insect are the most abundant and diversified of all animal due to their
Correct Answer

(D) Capacity of flight

Explanation

Solution: Insects are the most abundant and diversified of all animals due to their capacity for flight. The large populations and great variety of insects are related to their small size, high rates of reproduction, and abundance of suitable food supplies. The species richness of insects has been enhanced by their relative age, giving time for diversification to take place, capacity of flight also low extinction rates.

[#469] The variety resistant to Heterodera avenae in Barley is
Correct Answer

(C) C-164

Explanation

Solution: The variety resistant to Heterodera avenae in Barley is C-164. The C-164 variety of Barley is a tall, six-row variety with compact ears and long awns. This grain is usually bold, bright and amber. It is said to be resistant to yellow rust and heterodera avenae. Heterodera avenae, the cereal cyst nematode or European cyst nematode, is a plant pathogen and an obligate parasite of cereal crops including barley, oats, wheat and rye. Cereal crops infected with this nematode are more susceptible to infection by fungal diseases such as rhizoctonia root rot.

[#470] Match the following columns Column-I (Nematodes) Column-II (Crops) a. Paddy gall fly 1. Citrus nematode b. Tylenchulus semipenetrans 2. Cereal root nematode c. Heterodera avenae 3. Root knot of tamato d. Heterodera tabacum 4. Tobacco cyst nematode
Correct Answer

(C) a-3, b-1, c-2, d-4

Explanation

Solution: a. Paddy gall fly - Root knot of tomato. Root-knot nematodes are minute, worm-like animals that are very common in soil. They have a wide host range and cause problems in many annual and perennial crops. Tomatoes are among the most seriously affected, with the nematodes causing problems in all growing areas. b. Tylenchulus semipenetrans - Citrus nematode. Tylenchulus semipenetrans, also known as the citrus nematode or citrus root nematode, is a species of plant pathogenic nematodes and the causal agent of the slow decline of citrus. T. semipenetrans is found in most citrus production areas and diverse soil textures worldwide. c. Heterodera avenae - Cereal root nematode. Heterodera avenae, the cereal cyst nematode or European cyst nematode, is a plant pathogen and an obligate parasite of cereal crops including barley, oats, wheat and rye. Cereal crops infected with this nematode are more susceptible to infection by fungal diseases such as rhizoctonia root rot. d. Heterodera tabacum - Tobacco cyst nematode. Heterodera tabacum is synonym of Globodera tabacum. It is commonly known as a tobacco cyst nematode, a plant-parasitic nematode that mainly infests the tobacco plant, but also plants in family Solanaceae.