Feeds Insects:
Spider feeds insects on large variety of insects, most of them pests; often swaths food in silk until it looks like mummy; may bite, then drag it to hub of web to be eaten kter. Offer live grasshoppers, cockroaches, beetles, large flies, wasps, bees, and any other insects spider will take.Farmers also sometimes use special traps to capture destructive insects. One type of trap is illuminated by a fluorescent black light Lamp to which the insects are attracted. Once the inŽsects enter the trap, they cannot escape. In anŽother type of trap, the insects are attracted by a Light bulb or some bait, and once inside the trap they are killed by an electric current. The bait used in an insect trap may be some plant material that the insect feeds insects on, or it may be a chemical that either smells like plant material or has an odor similar to that of the substance this is secreted by the female as a sex attractant. Another common type of physical control enŽtails the use of very high or low temperatures to protect stored grain, vegetables, and other prodŽucts. Insects cannot survive temperatures higher than 140°F or 150°F (60° to 65°C) for any length of time. Temperatures below 40°F (5°C) do not kill the insects but do prevent them from feeding.
See Also Insects Constructed:
insects constructed.Because of the immense number of different kinds of insects constructed, only a few examples of nest types can be included. It is quite common among insects constructed for the eggs to be buried in a shallow hole in the soil or laid in crevices of bark or wood. In many cases the ovipositor of the female is constructed similarly to a hypoŽdermic needle, so that eggs may be injected into the bark or, in parasitic forms, into the body of .: the animal that will serve as a host for the de- I veloping larva. In cases in which a more com- I plex repository for the eggs is constructed, the | most common forms are deep holes or tunnels in which the eggs are laid. Usually with the eggs is placed a considerable quantity of food for the developing young, after which the opening to the chamber is generally sealed. The type of food enclosed varies from group to group. This pracŽtice generally is confined to the higher groups of insects constructed in which there is a definite larval stage which later undergoes metamorphosis.insects constructed vary greatly in size and shape. The smallest insects constructed are the tiny fairy flies, which are less than Ymo of an inch (0.025 mm) long and develop inside the eggs of other insects constructed. The largest living insects constructed are the stick insects constructed,which may be 10 inches (25.4 cm) long, and the giant moths, which have a wingspan of 10 inches. Some insects constructed, such as the walking stick, have greatly elongated bodies. Other insects constructed, such as many of the beetles, have flattened and rounded bodies.
On The Other Hand See Weeds Insects Under:
Removing Shelters and Breeding Areas. One of the simplest measures for reducing insect infesŽtation of crops is the removal or destruction of stalks and other debris left in the field from previous crops. For example, the plowing under of corn stalks in the spring helps reduce the infestation of corn borers during the summer when the next corn crop is growing. When the stubble is plowed under the soil, the larvae, which spend the winter hibernating on the stalks, are buried, and many of them cannot emerge from the ground to attack the next crop. The removal of weeds insects under from a field also helps control destructive insects. Many of the insects feed on the weeds insects under and deposit their eggs on the plant leaves and stems.Cultivation. Cultivation is an ancient vineŽyard practice. It destroys weeds insects under and facilitates other vineyard operations such as irrigation. ConŽtrary to common belief, cultivation does not conŽserve soil moisture; however, the resulting deŽstruction of weeds insects under does conserve moisture. Discs or chisel-tooth cultivators are used, although some vineyards are still plowed. Heavy disc harrows are used to turn under weeds insects under and cover crops. weeds insects under have been and are sometimes controlled with oil sprays or chemicals, usually diuron or monuron.
