insecticide

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insecticide

[in′sek·tə‚sīd]
(materials)
A chemical agent that destroys insects.
References in periodicals archive ?
Use of a non-residual, contact insecticide in ongoing cleaning and to treat used or second-hand furniture before it enters a building is highly recommended to eliminate concentrated infestations of bedbugs.
Otherwise spray them with the same contact insecticide.
In spring, when the gooseberry sawfly has a crack at the leaves on my gooseberries and blackcurrants - and solomons seal - I spray with a contact insecticide.
Use either an organic contact insecticide or an inorganic, systemic type which is absorbed into the plant and poisons pests when they attack it.
Both adults and grubs should be removed and killed as soon as you see them, or you might choose one of the fatty acid sprays that can be used as a contact insecticide without any damage to the environment.
The only way round the problem is to either spray the plants with a contact insecticide or pick off the flies as soon as you see them.
This knockdown effect is often less evident for a systemic insecticide applied in the soil than for a contact insecticide sprayed directly on the leaves.
Not easy to control, a residual contact insecticide sprayed during the adults' flight period does help although this is just as likely to harm bees and other desirable insects visiting flowers.
IF grubs have appeared in your raspberries in previous years, spray with a contact insecticide at petal fall and again as the fruits start to turn pink.
Or spray with a suitable contact insecticide, preferably early in the evening to minimise the danger to bees.
Although the majority of damage may now have been done for this year, try to control the remaining beetles using a contact insecticide.
If you can catch the attack early in the year regular picking off may suffice, but it is generally easier and more effective to spray with a contact insecticide such as derris, fenitrothion or Sybol.