Weed Activities
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Weedy Crossword

Hint: Use the information pages of this website to help you find the answers

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Clues

Across

1. The number and variety of plants and animals. This is reduced when weeds invade. (12)

5. You can use these in your garden to stop weeds coming through. A weed  ?   (3)

6. The larvae of this creature sometimes make galls on weeds. (3)

9. Regional councils help distribute and monitor biocontrol  ?  (6)   

11. Most of our environmental weeds escaped from  ?   (7)

12. Conservation officers from  ?   help to control weeds and monitor biocontrol agents that have been introduced to NZ. (3)

15. A good biocontrol agent does a lot of this. (3)

17. Hand-pulling, herbicides and biocontrol are all methods of  ? (7)

19. Biological control researchers search for these in the weed's homeland. (7, 7)

21. Native plants are an important   ?   for animals. They provide shelter and food.(8)

22. Some seeds have hooks and other attachments that can help seeds stick to the fur or wool of   ?  (9)   

Down

1. This method of control uses one organism to control another organism. (10, 7)

2. Weeds are spread when people  ?   their rubbish in reserves and on roadsides. (4)

3. Weeds can be  ?   by people, animals and cars! (6)

4. Weed seeds are often present in this food for farm animals. (3)

6. These make great biocontrol agents because they rob nutrients from weeds. (5)

7. These biocontrol agents can eat the leaves, seeds or even the roots of weeds. (6)

8. Many weeds produce lots of these to help them disperse and invade. (5)

10. It is important to test this so biocontrol agents don't attack native plants. (6)

13.   ?   brought weeds to NZ for crops, food for livestock, their gardens and because they missed their homeland. (8)

14. Birds like to eat these - but birds are helping to spread weeds!! (5)

16. Weed seeds can be found in the tyres of this. (3)

18. The country of  ?   for privet is China.

20. Trade between countries means that weeds can slip into NZ by   ?   (5)


Weeds in New Zealand