diff --git a/backend/fix-globi-pollinator-category.cjs b/backend/fix-globi-pollinator-category.cjs
new file mode 100644
index 0000000..9cdf989
--- /dev/null
+++ b/backend/fix-globi-pollinator-category.cjs
@@ -0,0 +1,69 @@
+#!/usr/bin/env node
+/**
+ * fix-globi-pollinator-category.cjs — retroactively apply the `hasHost` pollinator
+ * guard (lib/globi-classify.js) to already-loaded GloBI claims.
+ *
+ * ROOT CAUSE: GloBI uses `hasHost` broadly. The generic rule "invertebrate has
+ * host plant -> pest_pressure" branded every BEE->plant hasHost record a crop
+ * pest, because a bee IS an invertebrate and its "host plant" is its FORAGE
+ * plant. That produced the pollinator-as-pest artifact (~410 bee claims, and a
+ * wider pollinator tail) which then polluted the emergent-biocontrol discovery
+ * layer (a "pest" node that is actually a pollinator, preyed on by a beewolf).
+ *
+ * METHOD: rather than duplicate the mapping logic, this re-runs the (now fixed)
+ * classifyTriple() over the affected candidate set and writes back only where the
+ * derived category CHANGES. That makes it self-limiting — a genuine herbivore
+ * re-derives to pest_pressure and is left alone — and keeps one source of truth.
+ *
+ * Dry-run by default; --apply writes + revision_logs every field change.
+ */
+'use strict';
+const D = require('better-sqlite3');
+const { CORPUS_DB } = require('./lib/db-paths.cjs');
+const { classifyTriple } = require('./lib/globi-classify');
+const { logRevisions } = require('./lib/revision-log');
+
+const APPLY = process.argv.includes('--apply');
+const RAW_TERM = 'hasHost';
+const FROM_CAT = 'pest_pressure';
+
+const db = new D(CORPUS_DB);
+
+// entity lookup (the exact fields the loader feeds the classifier)
+const ents = new Map();
+for (const e of db.prepare('SELECT id, scientific_name, primary_role, bio_category, family FROM entities').all()) ents.set(e.id, e);
+
+const rows = db.prepare(
+  'SELECT id, subject_entity_id, object_entity_id, interaction_category, effect_direction, applied_weight, resolution_path FROM claims WHERE interaction_type_raw = ? AND interaction_category = ?'
+).all(RAW_TERM, FROM_CAT);
+
+let changed = 0, unchanged = 0, skipped = 0;
+const newCatDist = {};
+const run = db.transaction(() => {
+  for (const c of rows) {
+    const src = ents.get(c.subject_entity_id), tgt = ents.get(c.object_entity_id);
+    if (!src || !tgt) { skipped++; continue; }
+    let r; try { r = classifyTriple(src, tgt, RAW_TERM); } catch (e) { skipped++; continue; }
+    if (!r || !r.category || r.category === c.interaction_category) { unchanged++; continue; }
+    changed++; newCatDist[r.category] = (newCatDist[r.category] || 0) + 1;
+    if (APPLY) {
+      db.prepare('UPDATE claims SET interaction_category = ?, effect_direction = ?, applied_weight = ?, resolution_path = ? WHERE id = ?')
+        .run(r.category, r.effect ?? c.effect_direction, r.weight ?? c.applied_weight, r.path ?? c.resolution_path, c.id);
+      logRevisions(db, { targetType: 'claim', targetId: c.id,
+        changes: [
+          { field: 'interaction_category', before: c.interaction_category, after: r.category },
+          { field: 'effect_direction', before: c.effect_direction, after: r.effect ?? c.effect_direction },
+        ],
+        changedBy: 'globi-pollinator-fix', method: 'hasHost-pollinator-guard',
+        reason: 'bee/pollinator host-PLANT is forage, not pest association' });
+    }
+  }
+});
+run();
+
+console.log(`=== GloBI pollinator-as-pest re-derive ${APPLY ? '(APPLIED)' : '(DRY-RUN)'} ===`);
+console.log(`candidates (${RAW_TERM} + ${FROM_CAT}): ${rows.length}`);
+console.log(`  changed: ${changed} | unchanged (correctly pest): ${unchanged} | skipped (missing entity): ${skipped}`);
+console.log('  new categories:', JSON.stringify(newCatDist));
+if (!APPLY) console.log('\n(dry-run — re-run with --apply)');
+db.close();
diff --git a/backend/lib/globi-classify.js b/backend/lib/globi-classify.js
index d14cd19..418d1c0 100644
--- a/backend/lib/globi-classify.js
+++ b/backend/lib/globi-classify.js
@@ -76,6 +76,14 @@ const VARIABLE_TYPES = new Set([
 ]);
 const ANIMAL_CATEGORIES = new Set(['invertebrate', 'vertebrate']);
 const PEST_CATEGORIES = new Set(['invertebrate', 'fungi', 'microbe']);
+// Bee families. A bee's "host plant" (GloBI `hasHost`) is the plant it FORAGES
+// on — never a pest association. Family is the fallback signal because the
+// family-floor role pass left much of the corpus primary_role='unclassified',
+// so a role-only guard would miss most of them.
+const POLLINATOR_FAMILIES = new Set([
+  'apidae', 'halictidae', 'andrenidae', 'megachilidae', 'colletidae',
+  'melittidae', 'stenotritidae',
+]);
 
 const GENBANK_RE = /^[A-Z]{2}\d{6}/;
 function isGarbage(name) {
@@ -128,6 +136,8 @@ function resolveVariable(itype, src, tgt) {
   const tgtIsPlant = tgtBio === 'plantae';
   const srcIsPestCategory = PEST_CATEGORIES.has(srcBio);  // invertebrate, fungi, microbe
   const tgtIsPestCategory = PEST_CATEGORIES.has(tgtBio);
+  const srcIsPollinator = (src.primary_role || '').toLowerCase() === 'pollinator'
+    || POLLINATOR_FAMILIES.has((src.family || '').toLowerCase());
 
   switch (itype) {
 
@@ -237,6 +247,13 @@ function resolveVariable(itype, src, tgt) {
                path: `${srcBio} hosting ${tgtBio} → neutral` };
 
     case 'hasHost':
+      // A POLLINATOR's "host plant" is its FORAGE plant — GloBI uses `hasHost`
+      // broadly, so this MUST be checked before the generic invertebrate rule
+      // below, which would otherwise brand every bee→plant record a pest
+      // (the pollinator-as-pest artifact: ~410 bee claims).
+      if (srcIsPollinator && tgtIsPlant)
+        return { category: 'pollination', effect: 'beneficial', weight: 2.0, confidence: 'resolved',
+                 path: `pollinator has host plant → pollination/foraging` };
       // Fungi/microbe has host plant = pathogen pressure
       if ((srcBio === 'fungi' || srcBio === 'microbe') && tgtIsPlant)
         return { category: 'pathogen_pressure', effect: 'harmful', weight: -3.0, confidence: 'resolved',
diff --git a/backend/lib/globi-classify.test.js b/backend/lib/globi-classify.test.js
index 3ce27a3..53261b0 100644
--- a/backend/lib/globi-classify.test.js
+++ b/backend/lib/globi-classify.test.js
@@ -23,6 +23,39 @@ test('neutral co-occurrence returns null (skip)', () => {
   assert.equal(classifyTriple(plant, plant, 'adjacentTo'), null);
 });
 
+// ── hasHost + pollinator: the pollinator-as-pest artifact ────────────────────
+// GloBI uses `hasHost` broadly. For a bee, its "host plant" is the plant it
+// FORAGES on, not one it pests. Without a pollinator guard the generic
+// "invertebrate has host plant -> pest_pressure" rule turned every bee->plant
+// hasHost record into a harmful pest claim (the 410-claim artifact).
+const bee = { id: 10, scientific_name: 'Lasioglossum zephyrus', bio_category: 'invertebrate', family: 'Halictidae', primary_role: 'pollinator' };
+const beeUnclassified = { id: 11, scientific_name: 'Andrena nasonii', bio_category: 'invertebrate', family: 'Andrenidae', primary_role: 'unclassified' };
+
+test('hasHost: pollinator -> plant is FORAGE (pollination/beneficial), never pest_pressure', () => {
+  const r = classifyTriple(bee, plant, 'hasHost');
+  assert.equal(r.category, 'pollination');
+  assert.equal(r.effect, 'beneficial');
+});
+
+test('hasHost: bee recognised by FAMILY even when primary_role is unclassified', () => {
+  // The family-floor role work left much of the corpus 'unclassified', so the
+  // guard must not depend on primary_role alone.
+  const r = classifyTriple(beeUnclassified, plant, 'hasHost');
+  assert.equal(r.category, 'pollination');
+  assert.equal(r.effect, 'beneficial');
+});
+
+test('hasHost: a GENUINE herbivore -> plant still maps to pest_pressure (no over-correction)', () => {
+  const r = classifyTriple(bug, plant, 'hasHost');
+  assert.equal(r.category, 'pest_pressure');
+  assert.equal(r.effect, 'harmful');
+});
+
+test('hasHost: fungal pathogen -> plant still maps to pathogen_pressure', () => {
+  const fungus = { id: 12, scientific_name: 'Puccinia graminis', bio_category: 'fungi', family: 'Pucciniaceae' };
+  assert.equal(classifyTriple(fungus, plant, 'hasHost').category, 'pathogen_pressure');
+});
+
 test('hasVector: plant → animal is seed/pollen dispersal, NOT disease_vector', () => {
   const bat = { id: 4, scientific_name: 'Carollia perspicillata', bio_category: 'vertebrate', family: 'Phyllostomidae' };
   const ant = { id: 5, scientific_name: 'Formica fusca', bio_category: 'invertebrate', family: 'Formicidae' };