There are a number of ways in which tomato horn worms can be dealt with naturally without the use of pesticides or other chemicals. Since the insects are large in size they can be picked by hand and either drowned in water or cutting them in half.
Preventive methods include destroying the pupae that are present in the soil by turning the same before harvest periods. At certain times tiny white projections are seen on the back of these caterpillars which are eggs of a predator wasp. These eggs destroy the caterpillar when hatched. If you want to fight fire with fire, these wasps can be bought commercially and can be let loose on the caterpillar hordes. Bacillus thuringensis is a biological pesticide that can also be used.
Preventive methods include destroying the pupae that are present in the soil by turning the same before harvest periods. At certain times tiny white projections are seen on the back of these caterpillars which are eggs of a predator wasp. These eggs destroy the caterpillar when hatched. If you want to fight fire with fire, these wasps can be bought commercially and can be let loose on the caterpillar hordes. Bacillus thuringensis is a biological pesticide that can also be used.
