there an effective organic method of getting rid of the green shield
beetle? They are destroying my tomatoes.
being an organic practitioner, I asked the manager of our hortecology
unit, Richard Main, for his advice. He had three suggestions: sprays,
control of the alternative hosts, and growing resistant tomato varieties.
Richard has heard of
both pyrethrum and nicotine sprays being used to control the green
shield beetle. He also suggests the removal of any alternative plant
hosts, such as cape weed or mallow weed. There are also tomato varieties
which are said to be resistant.
The beetles over-winter
under garden refuse and pieces of wood in weedy areas, so having
a winter tidy-up could also be a good idea.
by Dr Dan Blanchon from Unitec's Diploma in Sustainable Horticulture and Bachelor
of Resource Management.
with permission from NZOOM Home and Garden content,
from the previous
The views expressed here are not necessarily those of the RNZIH