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Briefly describe a symptom of attack on a crop plant by each of the following invertebrates: (i) Aphids - Leaving Cert Agricultural Science - Question j - 2010
Question j
Briefly describe a symptom of attack on a crop plant by each of the following invertebrates: (i) Aphids. (ii) Flea beetles. (iii) Leatherjackets.
Worked Solution & Example Answer:Briefly describe a symptom of attack on a crop plant by each of the following invertebrates: (i) Aphids - Leaving Cert Agricultural Science - Question j - 2010
Step 1
(i) Aphids.
Answer
Aphids typically cause damage by sucking sap from the plant, resulting in leaves exhibiting holes or light-colored patches. This feeding can lead to the oozing of sticky sap and may cause new growth to appear deformed. Additionally, aphid attacks are often linked to the transmission of viral diseases, which may be observed through symptoms such as discoloration or stunting of development.
Step 2
Step 3
(iii) Leatherjackets.
Answer
Leatherjackets, the larvae of crane flies, cause notable damage by eating patches of grass and seedlings. This often results in young stems being bitten off, creating bare patches in the soil, and can lead to stems being flattened over at the soil surface. Additionally, roots may be damaged, compromising the overall health of the affected plants.