Fig Stem Borer

📖 Description

Fig Stem Borer (Batocera rufomaculata), also called Fig Longicorn or Tropical Fig Borer, is one of the most destructive pests of fig orchards across the Indian subcontinent, particularly severe in the major fig-growing belts of Maharashtra (Pune, Solapur, Sangli — India’s largest fig-producing region), Karnataka (Bengaluru Rural, Tumkur), Tamil Nadu (Coimbatore, Tirunelveli), Andhra Pradesh (Anantapur) and Gujarat where India is the world’s largest producer of figs (over 5,000 hectares cultivated). The pest is particularly damaging because (a) the larvae tunnel inside the main trunk and major branches for 4-8 months, completely hollowing out the wood and destroying the tree’s structural and vascular integrity, (b) infested trees show yellowing, wilting and dieback only after extensive internal damage has been done — by which time control is very difficult, (c) young trees (3-5 years old) can be completely girdled at the base, killing them outright, (d) infested trees become structurally weak and prone to wind-break, often toppling during monsoon storms, and (e) the pest has a long life cycle (1-2 years per generation) making it hard to detect and manage before damage is severe. The pest is most severe in older orchards (over 10 years old) and in trees under stress (water stress, nutrient deficiency, mechanical injury). IPM with regular scouting for bore holes and frass, immediate probing and killing of detected grubs, trunk painting with neem + lime + cow dung before peak egg-laying, light trap monitoring of adults, removal and burning of severely infested trees, and need-based insecticide injection into bore holes provides effective and sustainable control. The pest is a particular concern for organic fig growers (a growing market segment in India for fresh and dried figs) because once a grub is inside the trunk, organic control options are limited to mechanical probing — preventive trunk painting is the most important organic strategy.