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Immanuel

AGROECOSYSTEM

In our agroecosystem field trip last February ! "#$% in &ioSci area! 'e 'ere introduced

to plots containing (arious organisms and 'ere instructed to do identification and conduct an

in(estigation on t)e said plots and organisms* +iseases! insects! 'eeds! and crops,

T)e first site 'as near t)e green)ouses be)ind t)e &ioSci

 building! in front of Main-ib, Crops t)at are gro'n in t)e site

'ere tobacco . Nicotinia tabacum)! tomato .Solanum

lycopersicum/! and corn . Zea mays/* Organisms 'ere also

seen feasting and destroying t)e crops0 Homopterans!

 Hymenopterans! Tobacco mosaic virus! Tobacco leaf blig)t!

do'ny milde' of corn! corn rust! corn leaf and s)eat)e blig)t!

corn leaf spot! tomato 'ilt and can1er! Rottboelia

cochinchinensis, Imperita Cylindrica, Cynodon dactylon,

 Ipomea triloba! etc, 2o'e(er! t)ere 'ere also natural enemies

of insects present on t)e field! suc) are arac)nids, Also!

obser(ed near t)e scene 'ere crop protection management

and3or fertili4ing met)ods li1e placement of rice stra's

around t)e crops to eit)er pre(ent 'ater content of t)e soil to

e(aporate or pre(ent 'eeds from ac5uiring sunlig)t! t)us

 pre(enting its de(elopment,

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For t)e class6s second site! 'e 'ere guided to a green)ouse full of potted rice plants,

T)ese are 1no'n to be test sub7ects for inoculation of (arious diseases for furt)er e8amination

and study for t)e students and researc)ers ali1e, Suc) diseases are0 Xanthomonas oryzae pv

oryzae, !yricularia oryzae, Sclerophthora macrospora, and Rhizoctonia solani T)oug) fe'!

t)ere 'ere also 'eeds gro'ing from t)e same pots as t)e crops .Cyperus iria and Cyperus

rotundus/ and insect infestation e(idences seen on t)e plants0 c)e'ed up parts of t)e plants6

lea(es,

T)e class6s ne8t tour 'as in t)e apiary! located near t)e green)ouses, An artificial )abitat

for bees or a temporary colony instituted intended to produce and )ar(est )oney for economical

 purposes, T)ere 'ere " species of stingless bees being ta1en care of, Seen around t)e area 'ere

flo'ers of different 1inds! a fountain! ac1no'ledged

as t)e 'ater source for t)e bees! 'eeds li1e

 !istia stratiotes, "imosa pudica, Cynodondactylon, Imperita cylindruca* and! trees,

For t)e last leg of t)e tour! 'e 'ere broug)t to t)e ot)er side of t)ecompound to be presented 'it) Cocos nuci#era, "an$i#era indica! and %eucaena

leucocephala sprouts! and &i$na radiata, T)e smallest of t)e coconut seedlings

and %eucaena leucocephala 'ere potted and yet to be transplanted to t)e ground,

T)e mung beans! )o'e(er! are all potted because of t)eir natural gro't) si4e,

After careful e8amining t)ese plants! one may be able to see t)at t)e coconut

sprouts are actually eit)er inoculated or infested 'it) a disease of leaf blig)t,

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T)ere are also no obser(able crop protection met)ods done for t)ese plants e8cept from being

 plastically potted,

+iscussion of t)e impact to t)e

agro ecosystem ')en c)anges in t)e

follo'ing inputs are

SOI- S9:-IG2T ;ATER  

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To ans'er t)e 5uestion0 ')at 'ould be t)e impact to t)e agroecosystem ')en c)anges in

t)e follo'ing inputs are incorporated in t)e field0 monoculture! planting of a resistant (ariety!

and application t)at 1ill all art)ropods= Monoculture! t)e practice of planting only one species or 

(ariety of crop in a field! could pose a real problem in t)e long term because after some time!

 pests 'ould be attracted to t)ese crops and e(en after a period of pest controlling! )o'e(er

concentrated! t)ese pests 'ould de(elop resistance and ')en gi(en t)e opportunity to act! t)ey

could destroy t)e entire population of crops in s'ift stri1e,