2. Presentation
on
“Role of vitamin, minirals and other food constitutes in
insect nutritition.”
Majar Advisor:-
Dr. A. Shukla
Presented By :-
Dwarka prasad Athya
Roll no. 170119003
Msc(Ag) Entomology
Department of ENTOMOLOGY
COLLEGE OF AGRICULTURE
Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur
(M.P.)
3. VITAMINS
vitamins are organic substances which are
required in small quantities in the diet since
they can not be synthesized. They mostly
provide stuctural components of coenzymes.
The water soluble B vitamin, thiamine,
riboflavin, nicotinic, acid, pyridoxine and
pentothenic acid are essential to most insect.
Beta carotene (provitamin A) is required for
visual pigments and melanization .
Vitamin E(alpha tocopherol) is necessary for
4. VITAMINS
fecundity, spermatogenesis and
reproduction.
Ascorbic acid is required for cuticular
sclerotization.
Biotin is component of the enzyme pyruvate
carboxylase.
Fo;ic acid is necessary for nucleic acid
biosynthesis.
5. MINERALS
A dietary source of inorganic salts is
essential. Maintenance of an inorganic
balance suitable to the activity of living cells.
Iron is central element in cytochroms and be
in diet.
Zinc and manganege play an important role
in hardening the cuticle of mandibles in many
insects.
6. Other food constitutes in insect
nutritition
1. Carbohydrates.
2. Proteins and amino acids.
3. Lipids.
4. Fatty acids.
5. Phospholipids.
6. Sterols.
7. Amino acids are required for the
production of proteins which are used
for stuctural proteins, enzymes and
morphogenesis.
Although some 20 amino acids are
needed in the diet other can be
synthesezed from 10 essential amino
acids.
The 10 essential amino acids are
phenylalanine, arginine, lysine, leucine,
histidin, tryptophan, threonine,
PROTEINS AND AMINO ACIDS
8. isoleusine, methionine, and valine.
There is some variation in these
requirements by different insects.
In general the absence of any one of
these essential acids prevents growth.
sThe interchangeability of amion acids
depends to some extent on the
similarity of structure.
Tyrosine is synthesized from phenyl
alamine.
PROTEINS AND AMINO ACIDS
9. FATTY ACIDS
In insects they are present as
diacylglycerides and triacylglycerides.
They are also required for
thermoregulation, lipid mobilization and
immune response of caterpillars to
bacteria in the heamolymph.
Important in the reproduction of all
insects.
10. PHOSPHOLIPIDS
Choline and Myo inositol are constituents of
some phospholipids.
Some choline is necessary in diet for all
insects.
Choline has two main functions in insects:-
Phosphatidyl cholines (lecithin) which are
important in cell membranes Acetyl choline,
essential for neural transmission.
Inositol also a component of phospholipids
which is essential for phytophagous insects
and not for non-phytophagous insects.
Some insects synthesize inositol from
glucose.
11. STEROLS
Insects are unanble to synthesize
sterols.
Hence, they require sterols in diet for
normal growth and reproduction.
Insects feeding on animal tissue obtain
cholestrol directly from their food.
Cholestrol is a necessary precursor in
the synthesize of ecdysone.
