• A number of black insects are likely to infest tomatoes.Jupiterimages/Polka Dot/Getty Images
  
  A warm-season vegetable, tomato is a native of Central and South America. Though easy to grow, tomato plants are susceptible to a number of diseases and pest infestations, which include black-colored insects. Recognizing the pest or nature of the disease is the first step in effective management. As cited by the Ohio State University Extension, there are more varieties of tomatoes from which to choose than any other vegetable grown in home gardens.
  
  

Flea Beetles

• Flea beetles are cited as a potential pest of tomato plants by the University of California. The small, black beetles are shiny with large back legs for ease in jumping. The insects feed on tomato plant foliage, creating small holes and pits. Severe infestation creates large areas of ragged-looking foliage. Management includes keeping plants clear of debris and weeds, as these become overwintering sites for the insects. Use sulfur pesticides and carbaryl sprays as chemical control options.
  
  

Thrips

• The University of California lists thrips as among the insects likely to infest tomato plants. The insects with fringed wings are very small and slender and come in a range of colors including black. Thrips damage infested plants by feeding on succulent plant areas and sucking the sap or cell content. The insects are also likely to feed inside the enclosed plant areas such as buds and newly opening foliage. Management includes introduction of predatory insects, such as minute pirate bugs and predaceous mites, in infested plants. Chemical control options include the use of azadirachtin and pyrethrin.
  
  

Aphids

• Aphids are very small, soft insects that come in different colors including black. They are likely to infest tomato plants, as cited by the University of California. Aphids have long, piercing mouthparts, which help them suck fluids from the tender areas of the plants, such as foliage and stems. All aphid species are pear shaped with antennae and long legs. The insects are found in dense groups on foliage undersides and stems. Introduce predatory insects, such as parasitic wasps, syrphid fly and lady beetles, to control aphids biologically. Chemical control options include acephate, permethrin and malathion.