Pest Control
Gbogbo ọrọ náà
A field of healthy maize can be stripped to bare stalks in days when an army of caterpillars marches through it, and a thriving vegetable crop can be slowly drained by clouds of tiny aphids that you have to look closely to see. Pests are animals, mostly insects, that damage crops, and learning how each one lives is the first step to stopping it.
In this lesson you will follow the life cycle of a named insect pest, see how biting, sucking and boring pests damage crops in different ways, and learn the four families of control: chemical (contact and systemic pesticides), biological, biotechnical and cultural. You will learn why crop rotation breaks a pest's life cycle and how a systemic pesticide reaches a pest hidden inside the plant.
Ebumnobi
- (a) describe the life cycle, effect and method of spread of one pest from each of the following: • biting and chewing pests (e.g. grasshoppers, locusts, termites, leaf miners and beetles) • piercing and sucking pests (e.g. aphids, Bagrada bugs, mealy bugs and scale insects) • boring pests (e.g. weevils, stalk borer and American bollworm (Helicoverpa armigera)).
- (b) name and describe the mode of action of chemical controls for pests including contact pesticides and systemic pesticides and understand the appropriate use of these pesticides in controlling pests in the groups listed above.
- (c) describe biological and biotechnical methods of controlling pests.
- (d) describe methods of cultural pest control including rotation and catch cropping.
Nkuzi Olu
Gee ntị na nkuzi a na ngwa
Maapụ uche
E seela isiokwu a ka ị hụ otu echiche si ejikọta.
Mepee maapụ uche na ngwa
Kaadị ncheta
Omume ncheta ngwa ngwa n'ihe a na-anwale n'isiokwu a.
Mee omume kaadị ndị a na ngwa
Akwụkwọ Ọmụmụ
Ndetu Nkuzi Zuru Ezu di na Ngwa Green Bridge
Nweta ngwa Green Bridge CBT na ekwenti gi ma o bu kompiuta maka ulo akwukwo IGCSE zuru oke: akwukwo ule ndi gara aga, usoro nyocha, eserese uche, kaadi omumu na nkuzi olu.
Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Pest Control. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- Aphids damage crops mainly because they: A. Chew the leaves down to the veins B. Pierce the plant, suck sap and spread viruses C. Bore into the grain D. Eat the roots Answer: B
- Which stage of the African armyworm causes the damage to crops? A. Egg B. Larva (caterpillar) C. Pupa D. Adult moth Answer: B
- A systemic pesticide controls a pest by: A. Killing it only where the spray touches it B. Being absorbed into the plant so the pest is killed when it feeds C. Trapping it with a scent D. Drowning it Answer: B
- Crop rotation helps to control pests because it: A. Adds nutrients to the soil only B. Breaks the pest's life cycle by removing its food crop C. Increases the number of pests D. Replaces the need for harvesting Answer: B
- Which of these is an example of biological pest control? A. Spraying a contact insecticide B. Using ladybirds to eat aphids C. Ploughing the field D. Diluting a herbicide Answer: B
Rue ajuju ndi a n'ime ngwa ahu
Rue ajuju ndi a n'ime ngwa ahu
Akwụkwọ A Na-atụ Aro
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Pest Control? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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