The caterpillar disease on the gadung tubers ,,, !!! which damage the young leaves

caterpillar bullu is dangerous on the crop yam gadung ,,, but most we see caterpillars not only on the yam gadung alone but in other plants also in attack ,,,
for example caterpillar this one ,,,

• The Caterpillar Shelter Bag:
  
  Beautiful caterpillars, but be careful if exposed to toxins can cause symptoms of swelling, nausea and rashes for days. This caterpillar classified as greedy and eat all kinds of plants. Available in garden, flower pot, garden etc ..
  
  

just as I found this in the garden where I was doing the harvesting on the red pepper ,,
Leaves of this gadung yams are eaten by caterpillars so that the leaves of this gadung yams hagus brownish and dry to brittle to dust if we are to worry about the leaves .. ,, !!

How to overcome this caterpillar can we by spraying pesticides on every plant that is attacked by him ,,

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