insecticide

Any of a large group of substances used to kill insects. Such substances are mainly used to control pests that infest cultivated plants and crops or to eliminate disease-carrying insects in specific areas. Inorganic insecticides include arsenic, lead, and copper compounds. Some organic insecticides are natural, such as rotenone, pyrethrins, and nicotine (see toxin). Others are synthetic, such as chlorinated hydrocarbons (e.g., DDT, dieldrin, lindane); carbamates, related to urea (e.g., carbaryl, carbofuran); and parathions, organic phosphorus esters. Insect hormones may be included as a class. Insecticides may affect the nervous system, inhibit essential enzymes, or prevent larvae from maturing (e.g., juvenile hormone). Some are stomach poisons, some inhalation poisons, and others contact poisons. Agents such as inert oils act mechanically, simply blocking the breathing pores. Insecticides vary widely not only in effectiveness against target insects (which may develop resistance) but also in toxicity to nontarget species (including humans) and environmental effects; many of the worst (e.g., DDT) have been banned or their use curtailed.

insecticide [in′sek·tə‚sīd]

(materials)

A chemical agent that destroys insects.

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No references found	[ILLUSTRATION OMITTED] 4 Avoid the demon seed MANY FARMERS now buy seeds coated with clothianidin and other systemic insecticides. 10 ways to help save the bees! by New Internationalist Spray with systemic insecticide or fungicide if you detect symptoms of disease (as long as you''re not growing organic crops) and generally keep your tomato plants in as good a condition as possible. Disease Resistant Tomatoes - How to Identify Them by Liz Canham / Home improvement and landscaping community You will then need to treat the scale insects with a recommended systemic insecticide or a fatty acid spray if you are an organic gardener. GARDENING: Garden invaders and a fruity tree problem by Huddersfield Daily Examiner (Huddersfield, England)	System/38 System/390 System/3x System/88 Systemantics systematic systematic analog network testing approach systematic desensitization systematic distortion systematic error systematic error-checking code systematic joints systematic nomenclature systematic sampling systematic support Systematics Systematics, Animal Systematics, Plant Systeme International Systeme International d'Unites Système International d'Unités Système International d'Units systemic systemic circulation systemic inflammatory response syndrome Systemic insecticide systemic lupus erythematosus systems Systems Administrators Guild Systems Analysis systems analysis & design Systems Analysis Definition systems analyst Systems Application Architecture Systems Approach systems architecting systems architecture systems building systems definition Systems Development Life Cycle systems disk systems ecology systems engineer Systems Engineering systems for nuclear auxiliary power systems house systems implementation test systems integration systems integrator systems jock systems management	Systemic herbicide Systemic herbicide systemic histiocytosis systemic histiocytosis systemic histiocytosis systemic hypertension systemic hypertension systemic idiopathic fibrosis systemic immunoblastic proliferation Systemic infection Systemic infection Systemic infection Systemic Infections Associated with Pulmonary Artery Catheterization systemic inflammation response syndrome (SIRS) systemic inflammation response syndrome (SIRS) systemic inflammation response syndrome (SIRS) systemic inflammation response syndrome (SIRS) Systemic Inflammatory Disease systemic inflammatory response (SIR) systemic inflammatory response (SIR) systemic inflammatory response (SIR) systemic inflammatory response (SIR) Systemic inflammatory response syndrome Systemic inflammatory response syndrome Systemic inflammatory response syndrome Systemic inflammatory response syndrome Systemic inflammatory responses Systemic inflammatory responses Systemic Infrastructure Initiative Systemic Initiative for Montana Mathematics and Science Systemic insecticide Systemic Juvenile Idiopathic Arthritis Systemic Juvenile Rheumatoid Arthritis systemic lesion Systemic linguistics Systemic loop Systemic loop Systemic loop Systemic lupus erythamatosus Systemic lupus erythamatosus Systemic lupus erythamatosus Systemic lupus erythematosis Systemic lupus erythematosis Systemic lupus erythematosis systemic lupus erythematosus systemic lupus erythematosus systemic lupus erythematosus systemic lupus erythematosus systemic lupus erythematosus systemic lupus erythematosus (LE) e. (SLE) Systemic Lupus Erythematosus Disease Activity Index Systemic Lupus Erythematosus Genetics Systemic Lupus Erythematosus Quality of Life Systemic Lupus Erythematosus Self-Help Course Systemic Lupus Erythematosus with Central Nervous System Involvement Systemic Lupus International Collaborating Clinics Systemic Mast Cells Disease Systemic mastocytosis Systemic mastocytosis systemic memory hypothesis Systemic Morphogen of Connective Tissue

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[ILLUSTRATION OMITTED] 4 Avoid the demon seed MANY FARMERS now buy seeds coated with clothianidin and other systemic insecticides.

10 ways to help save the bees! by New Internationalist

Spray with systemic insecticide or fungicide if you detect symptoms of disease (as long as you''re not growing organic crops) and generally keep your tomato plants in as good a condition as possible.

Disease Resistant Tomatoes - How to Identify Them by Liz Canham / Home improvement and landscaping community

You will then need to treat the scale insects with a recommended systemic insecticide or a fatty acid spray if you are an organic gardener.

GARDENING: Garden invaders and a fruity tree problem by Huddersfield Daily Examiner (Huddersfield, England)

systematic analog network testing approach

systematic desensitization

systematic distortion