Disadvantages Of Lettuce

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LETTUCE
I decided to grow two different types of lettuce in the polytunnel. Lettuce is part of the ASTERACEAE family. The P.H. in the soil has a reading of 7. This means it is alkaline and is good ground for growing crops. It is recommended that a South-facing site be used and that the site has good drainage. There are four different varieties of Lettuce. They are:
• Butterheads.
• Cos and Semi-Cos.
• Crispheads.
Loose-Leaf.
BUTTERHEADS:
Butterheads are soft and round with either flat or frilly leaves.
COS AND SEMI-COS:
These are upright and more oval in shape with longer crisper leaves. They are known as ROMAINE Lettuce.
CRISPHEADS:
The Crispheads have round, dence heads, and very crunchy leaves. When their outer leaves are removed, they
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With Lettuce or any type of vegetable, it is recommended that you rotate the crop every year. This will stop the spread of pests and diseases to other plants.
PESTS:
There are many pests that affect the lettuce. They are:
• SLUGS
• SNAILS
• APHIDS
• CUTWORMS
• WIREWORMS
• LEATHERJACKETS
SLUGS AND SNAILS:
These eat young leaves and bury into the heart of the Lettuce. According to ‘TEAGASC’ “ the use of hollowed out grapefruit or orange laid on the surface of the soil, will attract the slugs which can then be destroyed”.
APHIDS:
These feed on roots and may cause the plant to wilt. ‘alphids’ are also known as ‘Blackfly’ or ‘Greenfly’. They fed on the sap and spread viruses between plants.
There are some ‘ORGANIC’ treatments available such as ‘PYRETHRUM, REFINED PLANT OILS, and INSECTICIDIAL SOAPS. Ladybirds, lacewigs and other insects make natural predators.

Cutworms:
Cutworms feed on the roots of young plants and also on the leaves closest to the ground, so weeding regularly reduces their choice of food.
LEATHERJACKETS:
They have no head or legs, but live in the soil. They eat roots and stems causing plants to wilt. Starlings, Trushes and Blackbirds love them.
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