You undertook a first-hand investigation to examine plant shoots and leaves for evidence of pathogens and insect pests - HSC - SSCE Biology - Question 26 - 2004 - Paper 1
Question 26
You undertook a first-hand investigation to examine plant shoots and leaves for evidence of pathogens and insect pests.
Using the information you gathered, complete ... show full transcript
Worked Solution & Example Answer:You undertook a first-hand investigation to examine plant shoots and leaves for evidence of pathogens and insect pests - HSC - SSCE Biology - Question 26 - 2004 - Paper 1
Step 1
Evidence of pathogen
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The evidence of a pathogen in plant shoots or leaves can include discoloration, such as yellowing or browning of the leaves, as well as visible lesions or spots. Fungal infections may also present as mold growth on the surface.
Step 2
Evidence of insect pest
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Evidence of insect pests may be indicated by holes or chewed areas on the leaves, stippling or discoloration, and the presence of insect debris such as frass (insect droppings) or shed exoskeletons.
Step 3
Equipment or procedure used for observation
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A hand lens or magnifying glass can be used for detailed observation of the plant surfaces to identify pathogens or insect pests. Additionally, visual inspection of the plants under varying light conditions can help highlight signs of damage.
