Agricultural Entomology - Study Mode

[#81] Stem injection or root feeding of Monocrotophos is recommended for the management of
Correct Answer

(D) Coconut black headed caterpillar

Explanation

Solution: Stem injection or root feeding of Monocrotophos is recommended for the management of Coconut black headed caterpillars. Stem injection of 10 ml monocrotophos 36 EC for maidan areas (method as described under red palm weevil). As indicated earlier, before root feeding and stem injection of pesticide, harvest the nuts and a waiting period of 45 days must be observed for harvest. Root feeding and stem injection (Monocrotophos) only once a year or maximum of twice. Don't use the coconut nuts up to 45 days after treatment. If any mature nuts are found on the tree, harvest the nuts before treatment.

[#82] The spiralling white fly infesting the leaves of many crops is
Correct Answer

(C) Aleurodicus dispersus

Explanation

Solution: The spiralling white fly infesting the leaves of many crops is Aleurodicus dispersus. Spiralling whitefly is not fly, but a sap sucking bug. It gets its name from the characteristic egg spirals that the adult whitefly deposits on foliage and fruit. The spiraling whitefly has been recorded on 38 genera of plants belonging to 27 plant families and more than 100 species. It is a tropical pest of a range of horticultural crops, ornamental plants and shade trees. It is common to find this pest attacking many vegetable, ornamental, fruit and shade tree crops in Hawaii.

[#83] Virus is generally type of parasite
Correct Answer

(A) Obligate

Explanation

Solution: Virus is general type of Obligate parasite. Viruses are small obligate intracellular parasites, which by definition contain either a RNA or DNA genome surrounded by a protective, virus-coded protein coat. Viruses may be viewed as mobile genetic elements, most probably of cellular origin and characterized by a long co-evolution of virus and host.

[#84] Father of insect physiology is
Correct Answer

(C) Wigglesworth

Explanation

Solution: Father of insect physiology is Wigglesworth. Sir Vincent Brian Wigglesworth was a British entomologist who made significant contributions to the field of insect physiology. Wigglesworth was able to distort the developmental phases of the insect by controlling levels of this hormone. The bacterium Wigglesworthia glossinidia, which lives in the gut of the tsetse fly, is named for him.

[#85] Type of diapause found in Bombyx mori is
Correct Answer

(D) Embryonic

Explanation

Solution: Type of diapause found in Bombyx mori is Embryonic. In Bombyx mori, embryonic diapause is induced transgenerationally as a maternal effect. In the silkworm, Bombyx mori, diapause occurs at a specific embryonic stage, i.e. after formation of the germ band with cephalic lobes and telson and sequential mesoderm segmentation. As long as the eggs are incubated at 25°C, cell divisions and morphological development of the embryos cease.