Gadenin日本語Get the appBirds will take the whole crop
Loquat ripens when very little else is available, the fruit is soft-skinned and highly visible against dark leaves, and it sits in open trusses at the ends of branches. Birds find it immediately. A tree that looked heavily laden on a Friday can be stripped or holed by the following week, and a single peck is enough to start rot in a fruit that would otherwise have ripened perfectly. Squirrels and other climbing animals do the same job faster and more comprehensively.
Netting the whole tree works if the tree is small enough to net properly, meaning the net reaches the ground and is tied around the trunk. A net draped over the top with gaps at the sides simply funnels birds in and occasionally traps them, which is worse than doing nothing. This is one of the practical arguments for keeping the tree pruned to eight to twelve feet (2.4 to 3.7 m).
Bagging individual trusses is the more reliable method and the one worth learning. After thinning, slip a paper bag, an organza drawstring bag or a fine mesh sleeve over each truss and close it around the stem. The bag stops birds and most insects outright, reduces sunburn on exposed fruit, and keeps rain off the skin during the splitting-prone final weeks. Fruit inside a bag colors slightly more slowly and slightly more evenly, and you find it undamaged rather than pecked.
Bag at the same time as you thin, while the fruit is still small. Waiting until the fruit starts to color means the birds have already found the tree, and a bag put on afterwards is protecting fruit that is already marked.
| Protection | Effectiveness | Effort | Best for |
|---|---|---|---|
| Bagging each truss | Very high | High, one-off per truss | Any tree, especially large ones |
| Full net to the ground | High if sealed properly | Moderate | Small or wall-trained trees |
| Net draped over the top | Low | Low | Not worth doing |
| Reflective tape and scarers | Low, brief | Low | Short-term gap before bagging |
| Picking slightly early | Partial | None | Nothing, the fruit will not sweeten |
Fire blight is the disease that matters
Loquat belongs to the same family as pear and apple and is fully susceptible to fire blight, a bacterial disease that enters through flowers and soft new shoots. The signature is unmistakable once you have seen it: a shoot tip suddenly wilts and bends over into a shepherd's crook, and the leaves turn black or dark brown and stay attached rather than falling. It looks as though a blowtorch has been run along that branch. In warm humid weather it moves down the branch quickly and can reach the trunk of a young tree in a single season.
There is no spray that cures it in a garden. The treatment is surgical and it is urgent. Cut the affected shoot out at least twelve inches (30 cm) below the lowest visible discoloration, into clean healthy wood, and take the prunings well away from the tree and destroy them. Sterilize the blades between every cut with alcohol or a disinfectant solution, because the tool itself carries the bacteria into the next wound you make. Cut in dry weather; pruning a blighted tree in the rain spreads it.
Prevention comes down to not producing the tissue that gets infected. Avoid heavy nitrogen feeding, which makes exactly the soft succulent shoots the bacteria colonise. Avoid heavy pruning that provokes a mass of watersprouts. Keep the canopy open so it dries. And inspect the tree after every warm humid spell during and just after flowering, which is the infection window.
If a blighted branch has reached the main trunk or the graft union on a young tree, the tree is usually lost. Removing it promptly protects other trees in the same garden, and pear and apple nearby are at risk from the same infection.
Spots, marks and the fruit that splits
Most other loquat troubles are cosmetic or cultural and none of them justify panic. Dark purple-brown blotches on the skin of otherwise sound fruit are usually a physiological disorder rather than a disease: the flesh underneath is fine and the fruit is edible. It is associated with irregular water supply and with nutrient imbalance in the fruit, and evening out irrigation through the swelling weeks reduces it more than any spray will.
Circular brown or gray spots on the leaves, sometimes with a darker margin, are fungal leaf spots that build up on old foliage in a crowded, damp canopy. They rarely threaten the tree. Rake up and remove fallen leaves, prune to open the interior, and the problem retreats. Scab appears as dark scurfy patches on fruit skin and, in a wet spring, can be more than cosmetic if it cracks the surface.
Split fruit is a water problem, not a disease. It happens when a dry period is followed by heavy rain or heavy irrigation as the fruit is coloring, the flesh swells faster than the skin can stretch, and the skin gives way at the stem end. Once split, the fruit rots quickly and draws wasps. Mulch and steady watering through the last few weeks are the fix. Bagged fruit splits less because the bag buffers the direct wetting of the skin.
Sunburn shows as a pale bleached patch on the exposed shoulder of fruit hanging in full sun on a bare branch, particularly after pruning has removed the leaves that shaded it. It is another argument for bagging.
| Symptom | Likely cause | Action |
|---|---|---|
| Shoot tip wilted, blackened, hooked | Fire blight | Cut twelve inches (30 cm) below, sterilize tools, destroy prunings |
| Purple-brown blotches on the skin | Physiological, water and nutrient swings | Even out irrigation and mulch; fruit is edible |
| Fruit split at the stem end | Rain or watering after a dry spell | Steady moisture, mulch, bag the trusses |
| Round brown spots on older leaves | Fungal leaf spot | Open the canopy, remove fallen leaves |
| Pale bleached patch on exposed fruit | Sunburn | Keep shading foliage, bag the fruit |
| Sticky leaves, black sooty coating | Aphids or scale feeding above | Wash off, treat the insects, not the mold |
Insects worth watching
Aphids cluster on the soft new growth after harvest and on developing flower trusses, curling the leaf tips and leaving sticky honeydew that turns black with sooty mold. A strong jet of water knocks most of them off, and a bad colony can be pruned out with the shoot it sits on. Scale insects are more persistent: they appear as small brown or gray limpets on twigs and along the leaf midribs and produce the same honeydew. Rub them off small infestations by hand and treat heavier ones with horticultural oil while the tree is not in flower.
In warmer regions fruit fly will lay in ripening loquats, and the first sign is a small puncture with a soft brown area around it and larvae inside otherwise perfect fruit. Bagging the trusses is the most effective home defense, along with picking up and disposing of every dropped fruit rather than leaving fallen fruit to breed the next generation under the tree.
Do not spray a flowering loquat. It blooms when almost nothing else does and the bees working it in late autumn are what set your crop. Anything that kills insects on those flowers costs you fruit directly.
Keep a problem log
Record the date you first see each problem and where on the tree it appeared. Fire blight in particular follows a pattern tied to warm humid weather during bloom, and having the dates from two or three seasons tells you which weeks to be inspecting rather than relying on noticing it by chance.
Note the branch you cut out and how far below the damage you cut. If the same limb blights again the following year, you did not cut far enough, and that is only visible from a written record. Photographs of the first symptoms are worth keeping too, because the difference between blight and ordinary frost damage on a shoot tip is much easier to judge side by side than from memory.