CSC 331: PRINCIPLES OF CROP PROTECTION

UNIVERSITY OF NIGERIA NSUKKA

FACULTY OF AGRICULTURE

DEPARTMENT OF CROP SCIENCE

SESSION: 2011/2012

COURSE NAME: CSC 331: PRINCIPLES OF CROP PROTECTION

1.    An insect head is formed by the fusion of 6 embryonic segments. Give the names of the fourth, and the sixth segments.

2.    Give one example of an insect belonging to each of the following orders.

(i)           Orthopetera

(ii)          Isoptera

(iii)          Ephemeroptera

(iv)         Thysanoptera (v) Coleoptera

3.    Give one example of the following insecticide formulations.

(i)             Dust

(ii)            Granule

(iii)            Tablet

(iv)           Emulsifiable concentrate 

(v)            wettable powders

(vi)           Organochloride

(vii)           Organophosphate

(viii)          Carbamate

4.   Name three (3) mode of viral classification

5.   List the three (3) divisions of the RNA viruses

6.    Enumerate the two (2) types of reverse transcribing viruses

7.    List three (3) sub-viral particles

8.    Name three (3) sub-viralaprticles

9.    Every lethal viral antigen killsits host (Tue/False)

10.   What is bacteriophage

11.   A plant disease may be defined as what?

12.   What is a disease symptom?

13    Explain shortly six (6) disease symptoms