Insect-pests of winter season Vegetable crops

Answer key at bottom…

Question 01. The females of potato tuber moth are distinguished from males by having a..?

(a). White X pattern on forewing.
(b). Black X pattern on forewing.
(c). White X pattern on hindwing.
(d). White X pattern on hindwing.

Question 02. The larvae of potato tuber moth generally locate the tubers within..?
(a). 2 cm of the soil surface.
(b). 1 cm of the soil surface.
(c). 1.5 cm of the soil surface.
(d). All of the above.

Question 03. The damage on foliage by potato tuber moth is known as..?

(a). Scratch mines.
(b). White mines.
(c). Blotch mines.
(d). Serpentine mines.

Question 04. The potato tuber moth feeds on..?
(a). Mesophyll.
(b). Chlorophyll.
(c). Both a and b.
(d). None of the above.

Question 05. The potato tuber moth also attack on..?

(a). Egg plant.
(b). Tomato.
(c). Bell peppers.
(d). All of the above.

Question 06. The amino acid …. inside potato tuber plays key role in helping determine plant selection for oviposition?

(a). G-glutamic.
(b). S-glutamic.
(c). L-glutamuc.
(d). C-glutamic.

Question 07. …. is larval parasite of potato tuber moth?

(a). Apanteles subandinus.
(b). A. geochrys.
(c). A. irianyn.
(d). A. subandalis.

Question 08. The following wasp Diadegma mollipla parasite on..?

(a). Larva.
(b). Pupa.
(c). Eggs.
(d). All.

Question 09. The male moth of potato tuber moth walk in a …. route after sensing pheromone released by females?

(a). Strait flying.
(b). Up and down flying.
(c). Zig-zagging.
(d). All of the above.

Question 10. The pheromone released by the female potato tuner moth is composed of..?

(a). Didecadienyl and tridecadienyl acetates.
(b). Didecadienyl and tetradecadienyl acetates.
(c). Tridecadienyl and tridecatrienyl acetates.
(d). Tridecadienyl and tetradecatrienyl acetates.

*Jassid and Aphid

Question 11. The exact scientific name of jassid is..?

(a). Amarasca biguttula L.
(b). Amarasca biguttula Ishida.
(c). Amarasca biguttula Fab.
(d). Amarasca biguttula Dav.

Question 12. Jassid belongs to the order..?

(a). Hemiptera.
(b). Coleoptera.
(c). Diptera.
(d). Gelechiidae.

Question 13. The family of jassid is..?
(a). Thripidae.
(b). Aphididae.
(c). Cicadellidae.
(d). None of the above.

Question 14. The Myzus persicae appears ..?
(a). Early in the season.
(b). Mid of the season.
(c). Late in the season.
(d). All are true.

Question 15. The cotton jassid is on of the most destructive pest of..?

(a). American cotton.
(b). Indian cotton.
(c). Srilankan cotton.
(d). Chinese cotton.

Question 16. Damage by jassid is done at..?

(a). Nymph stage.
(b). Adult stage.
(c). Both a and b.
(d). None of the above.

Question 17. During winter, only the … is found on plants?

(a). Male.
(b). Female.
(c). Nymph.
(d). All.

Question 18. Jassid completes …. generation in a year?

(a). 5.
(b). 6.
(c). 7.
(d). 12.

Question 19. Spider …. feed on nymphs and adults of jassid?
(a). Chrysoperla sp.
(b). Distina albia.
(c). Both a and b.
(d).  None of the above.

Question 20. Chrysoperla sp. which feeds on nymphs and adults of jassid is a..?

(a). Spider.
(b). Bug.
(c). Lacewing.
(d). Butterfly.

Question 21. The jassid can reduce cotton yield up to..?

(a). 15%.
(b). 25%.
(c). 35%.
(d). 45%.

Question 22. The economic threshold level of jassid is..?

(a). 2 – 5 nymphs per plant.
(b). 5 – 10 nymphs per plant.
(c). 10 – 15 nymphs per plant.
(d). 1 – 2 nymphs per plant.

Question 23. The second grade injury symptoms by jassids are..?

(a). Yellowing at margin of leaves.
(b). Curling at margin of leaves.
(c). Both a and b.
(d). None of the above.

Question 24. A. biguttula is also known as..?

(a). Loophopper.
(b). Leafhopper.
(c). Semi-looper.
(d). None of the above.

Question 24. Which is true about the nymphs of cotton jassids?

(a). They have wings.
(b). They don’t have wings.
(c). They have wing but detach it after sometimes.
(d). None of the above.

  1. b. 02. b. 03. c. 04. a. 05. d. 06. c. 07. a. 08. a. 09. c. 10. c. 11. b. 12. a. 13. c. 14. c. 15. a. 16. c. 17.. a. 18
    . c. 19. b. 20. c. 21. c. 22. d. 23.. c. 24.. b. 25. b.

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