Agricultural Entomology - Study Mode

[#181] Haltere present in which order
Correct Answer

(B) Diptera

Explanation

Solution: Haltere present in which order Diptera. Halteres are a pair of small club-shaped organs on the body of two orders of flying insects that provide information about body rotations during flight. Insects of the large order Diptera (flies) have halteres that evolved from a pair of ancestral hindwings, while males of the much smaller order Strepsiptera (stylops) have halteres that evolved from a pair of ancestral forewings.

[#182] Dead heart in the wheat central shoot is a characteristic symptoms of
Correct Answer

(B) Stem borer (Sesamia inferens)

Explanation

Solution: Dead hearts in the wheat central shoot is a characteristic symptoms of Stem borer (Sesamia inferens). The pink borer (Sesamia inferens Walker) lays spherical, yellowish white eggs in batches of 30 - 100 eggs in two to three parallel lines on the leaf sheaths or the leaf surface. The larva is pinkish, smooth, and measures about 30 mm when fully grown. It produces deadheart symptoms due to the internal feeding of the larvae.

[#183] Which pest of potato attacks the tuber both in field and storage?
Correct Answer

(C) Potato tuber moth

Explanation

Solution: Potato tuber moth pest of potato attacks the tuber both in field and in storage. They attack potatoes in the field and storage. The larvae mine the young leaves and tunnel into the tubers, leaving frass (faeces and other remains) from tunneling at the entrance. When the larvae leave the tunnels, fungi, bacteria and mites take over, and tubers rot and have an unpleasant smell.

[#184] The following is the most notorious polyphagous pest
Correct Answer

(C) Helicoverpa armigera

Explanation

Solution: The most notorious polyphagous pest is Helicoverpa armigera. Helicoverpa armigera is a species of Lepidoptera in the family Noctuidae. It is known as the cotton bollworm, corn earworm, Old World (African) bollworm, or scarce bordered straw. The larvae feed on a wide range of plants, including many important cultivated crops. It is a major pest in cotton and most polyphagous and cosmopolitan pest species. The cotton bollworm is a highly polyphagous species. The most important crop hosts are tomato, cotton, pigeon pea, chickpea, rice, sorghum, and cowpea.

[#185] Following is the acaricide widely recommended for mite management
Correct Answer

(A) Kelthane

Explanation

Solution: Kelthane is the acaricide widely recommended for mite management. Kelthane 50 WSP Miti- cide is a specific contact miticide recommended for use on trees, shrubs, foliage plants, listed fruit-bearing trees and flowers in outdoor plantscapes, nurseries and greenhouses. Acaricides are pesticides used to kill ticks and mites. Acaricides include chlorinated hydrocarbons, organophosphorous compounds, carbamates, pyrethroids, formamidines and avermectins.