7 - part

1l|rvestin
In harvestinq two malor aspects are emphiasized,
matuity iindices and harvestiegj methods.
Studes of naturoy irind:.s are aied at establishinq
tile stalr, :f fruit deve!opnieit foi optiunIIIIii liarvestinq,
St(rdage lite
i w, I.> .
in h
; ciate-i v.
be,y :f p t
ii, h,
'Ilphiu'.
/11ethxi;S ;tuJIdid Iulihid.,
vVisual lie l ii htit ,s'",
Physical cli
size).
't' rStics .;pe fi: qravitv texillle.
* Chemical atti ilbtes (pi1 TIS ['A, i d stiach,
Iiid sgOail Co011tent).
* Computation (peliod etweetn flcwering, or
initial fruit setting and ,qptinin giovth).
" Physiological 'ttributes
t (re;sizatoi y pattern.
etlyleue productu-n).
S.tudie; of the tatity iiilce. of loA fr'.iit;
hive beeti conductud for bai na, pineapple. mngjo,
.apota, papaya, ste: it, sonsop, quava, jacktruit
and some other 'i si banana, the optimur
harvesting stage:, for M,;. Iimtn and hferaniailyti v-
riedies are reported t, b-e ri sevei and iine
weeks 12-15 wek I 1d1i.
week.I 31 i. , respectively,
from tie stage A Wv n.ret aence. For
mango, s;tuies have L1n 'ion dt i five viriet-
ios, naliel'' HarlunM11lis (I,, 123) C-lo IA 162).
Tok Loon (NIA 121";), Apple-(IA 1'94)d f'.tj' rill.
As well a. ni.taiit, idices, emphasis has alsc.
been ptiaced on the t:lpioveneist of harvesting tech
niques. A harvestine t,o-icli is,practical, simple
and economical liis een reveloped for mango' i
Harvestig tool for manjo
/
., . . . ,
- 28 ­
The tool is a pole with a ring and catching net on
the end the ring is ;8 cn1 ili tldiameter, made of
netal coated with lubber tubillqj. leUp~er part
of th ian,; has five pron(,s, and the lower part has
three. Ditinl
0 b haivesting, the tool is placed so that
/ilt i ,lw the ;i ;uqs imu the stem is above them.
ll to )li u. hfwsnen the fruit is attachcr to the
I0 L; l I f jit a ,ati the ulpper ring,
.i!l li haivestted fruit is ollected in tile act.
'tinllt .
Reseaich into fruit storage is mainly
concerne with ef'r igerat io; and n od ified
atmosphere (M.A.) techniques. The occuirrence
of chilling iijury, and chai es.; in chenical
composit ion and og us.depic lioperties after
e a;l(,ri e tudh(. III (iei t , 'eltbn the
optimrn tcmperaturr:; tot 'telqe over various
perods of tite. [rlfOilll i(it 1i
1 thaile lhvsiological
behavioL 0tl e.i) - )JiI,.,dit, . iiow aliso
iviiaible. The lesllt of
. ;One of the earlier
studies have been suIInuui;:ied by Aldullali it
,efrigera itoti how , ;tltiot be, used
for ill types of fruit i itIray cause physiological
di;orders i; add it cc to chilliit injury, such
a:; b'lack heil or internl birovning in pineapple.
Black heart I iple is charicterized by
the dalkenn g o: flesha tissue after tile fruit has
been store 11, i; ia tire:; lowe! ,Ian 20 C.
intensity if the di ,ojder is greutly infliiiced
i,,y steia(e tineerie ftc. sioi ige period and the
period of exposur, to hiiliel telfrofature after
0 (Jetrig eitInii - . TIwo imporitant ocal varieties,
- -
irit!u; .M iid , 1.wa live been found
develop
to
ie c: luring or after storage.
Tie developmernt -f i lack hast can be effectively
controlled by theintheraplihy , modified aitmo­
spherel ', or by liiing tWe lenah ti e period the
fruit is kept at ambient temperatures after storage'i'
Itesides refrigeration, studies have also Leen
coriducto- on the use of modified atmosphere
(M \.) storage for banana, mango, papaya and
rambutan. When it is used for the storage of
Mas baiana, M.A. storage may result in CO,
injury, chaiacterized by blackening of the