M u n d a r e j a
Kirish ……………………………………............................................... . 3
Mavzuning dolzarbligi…………………………………………………..3
Tadqiqot maqsadi………………………………………………………..5
Tadqiqot vazifalar : ………………………………………………………6
1.Adabiyotlar sharhi…………………………………................................7
1.1. O‟simliklarni biologik himoyalashning qisqacha rivojlanish tarixi ....7
1.2. Organizmlarning ekologik sistemadagi o‟zaro munosabatlari ...........10
1.3. Paxta –beda almashlab ekishda entomosinozlarning shakillanishi ....13
1.4. G‟o‟zaning eng asosiy zararkunandalari ............................................17
1.5.O‟simliklarni biologik usulda himoya qilishningasosiy yo‟nalishlari...
1.6. Eng asosiy g‟o‟za zararkunandalarning yirtqichlari va
tekinxo‟rlari.................................................................................................32
2.
TADQIQOT SHAROITLARI, OBEKTI VA USLUBLARI...........................34
2.1.Tadqiqot sharoitlari.............................................................................34
2.2. Tadqiqot obektlari……………………………………………........34
2.3. Tadqiqot uslublari…………………………………………………34
3. Tadqiqot natijalari..................................................................................36
3.1 Trixogrammaning morfologik, biologik xususiyatlari.....................36
3.2. Brakonning morfalogik biologik xususiyatlari.................................45
3.3.Trixogramma
va
brakoni
zararkunanda
tunlamlarga
qarshi
qo‟llash........................................................................................................50
Xulosalar ..................................................................................................69
Tavsiyalar..................................................................................................70
Foydalanilgan adabiyotlar ro‟yxati..........................................................71
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