does it have any positive effect on economy?
Yes - The silk industry is based on the silkworm caterpillar.
Caterpillar
Some caterpillars are used in industry. The silk industry is based on the silkworm caterpillar.
what short stories did edgar allan poe write MS. Found in a Bottle was he in military? Yes - he was in the United States Army as a private on May 27, 1827 what are some of the components of the us army? Regular Army, the Army Reserve and the Army National Guard does it have special forces? Yes - 1st Special Forces Group (Airborne), 3rd Special Forces Group (Airborne), 5th Special Forces Group (Airborne) which vehicle do they use? M1A2 Abrams, M2A3 Bradley,  Stryker, AH-64 Apache attack helicopter who produced the third vehicle? General Dynamics Land Systems does it contain weaponry? Yes -  .50 in (12.7 mm) M2 machine gun,  7.62 mm M240B machine gun, or 40 mm Mk 19 grenade launcher. what is its variant? M1256 ICVV, M1252 MCVV, M1255 CVV what are some of its mechanical features? Pneumatic or hydraulic systems and its engine features? For its powerpack the Stryker uses a Caterpillar diesel engine common in U.S. Army medium-lift trucks, eliminating additional training for maintenance crews and allowing the use of common parts. the insect name that you just mentioned, how does it effect the health of humans? Caterpillar hairs sometimes have venoms in them and species from approximately 12 families of moths or butterflies worldwide can inflict serious human injuries ranging from urticarial dermatitis and atopic asthma to osteochondritis, consumption coagulopathy, kidney failure, and brain bleeding. how is it related to economy? Caterpillars cause much damage, mainly by eating leaves.The cotton bollworm causes enormous losses. Other species eat food crops. Caterpillars have been the target of pest control through the use of pesticides, biological control and agronomic practices
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Caterpillar [SEP] Economic effects
These approaches are defeated over time by the evolution of resistance mechanisms in the insects. Plants evolve mechanisms of resistance to being eaten by caterpillars, including the evolution of chemical toxins and physical barriers such as hairs. Incorporating host plant resistance (HPR) through plant breeding is another approach used in reducing the impact of caterpillars on crop plants. Some caterpillars are used in industry. The silk industry is based on the silkworm caterpillar.