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GARDEN PESTS AND DISEASES

F - M

Grosafe Garden has a wide range of Insecticides and Fungicides to assist in controlling many common pests and diseases found in New Zealand gardens. Our range is certified for organic input No.4547.

Please check our Organic Spray Calendar for the optimum times to apply treatment.

Fire Blight

Fire Blight

Fire Blight is caused by bacteria. The infection often moves to twigs and branches from infected blossoms. The flowers turn brown and wilt and twigs shrivel and blacken, often curling at the ends. The first sign of fire blight is a light tan to reddish, watery ooze coming from the infected branch, twig, or trunk cankers. Fire blight bacteria is spread through various means such as rain or water splashing, insects and birds, other infected plants, and unclean gardening tools.

Treat with Grosafe Free Flo Copper

Leaf Curl

Leaf Curl

A fungal disease that affects peaches, nectarines and other stone fruits, leaf curl is one of the most common disease problems found in backyard orchards. Peach leaf curl affects the blossoms, fruit, leaves, and shoots. Symptoms appears in spring as reddish areas on young leaves. These areas become thick and puckered causing leaves to curl and distort.

Treat with Grosafe Free Flo Copper 

Leaf Miners

Leaf Miners

Thin whitish trails in leaves are a sure sign of leaf miners. Leaf miners are larvae that feed between the upper and lower surfaces of leaves. The adults may be flies, moths, sawflies, or beetles. Leaf miners attack all kinds of plants, from vegetables to fruits, flowers, trees, and shrubs. Sometimes bacteria and fungi can enter old mines and cause the leaves to yellow and drop.

Treat with Grosafe EnSpray 99® Spraying Oil

Leaf Roller Caterpillar

 Leaf Roller Caterpillar

Leafrollers are small caterpillars, often with dark heads and bodies in colours ranging from green to brown. They feed inside nests made from leaves of their host plants, rolled together and tied with silk. When there are lots of nests in a plant, defoliation may occur. High numbers of leaf rollers may also feed on fruits, causing scarring and deformity.

Treat with Grosafe Bactur® Caterpillar Killer

Leaf Spot

Leaf Spot

Leaf Spot is a commonly used descriptor for identifying many different plant diseases. Most leaf spot is fungal but some is also caused by bacteria. Leaf Spots are typically brown, but depending on the type of fungus, the spot could also be tan or black. Leaves infected with leaf spot will yellow and may drop prematurely, where the spores sit and wait for the next available warm, wet, plant surface so the fungal leaf spot process can begin again.

Treat with Grosafe Free Flo Copper

Lichen

Lichen

A composite organism made up of a fungus, that grows symbiotically with an alga and characteristically forms a crust like or branching growth on rocks or tree trunks. Lichens do not usually cause disease or damage and their removal is mostly for cosmetic reasons.

Treat with Grosafe Lime Sulphur

Looper Caterpillar

Looper Caterpillar

Looper caterpillars are so named because of their looping, wobbly movement. They are commonly found on cruciferous vegetables such as cabbage, cauliflower and broccoli. It is best to use organic cabbage looper pesticides on food crops, they are safer and do not kill most beneficial insects. Bacillus thuringiensis (the active component of Grosafe Bactur®) is an organic bacterium, which occurs naturally in soil. Consistent cabbage looper control will gradually reduce the incidence of the pests in your garden.

Treat with Grosafe Bactur® Caterpillar Killer

Mealybugs

Mealybugs

Mealybugs are very small, soft-bodied, oval-shaped insects that are covered with a white, powdery wax coating. Mealybugs are plant feeders and will infest most parts of their host plant. They normally are located on the underside of plant leaves and stems. Mealybugs attract ants by excreting honeydew, a sticky, sweet substance that the ants feed on. This substance may encourage the growth of sooty molds.

Treat with Grosafe Organic EnSpray 99® Insect Oil

Melanose

 Melanose

All citrus varieties are susceptible to melanose infection, it affects the immature leaves, young branches, stalks, stems and fruit. Melanose symptoms occur on fruit and consist of dark-brown specks on the portion around the oil glands. On mature fruit the fungus causes fruit rot. The rind slowly becomes dark brown and becomes tougher. Careful pruning and sanitation of infected trees is essential to prevent further spread of the fungus.

Treat with Grosafe Free Flo Copper

 

Mites

Mites

Mites are very small sap sucking insects that can be hard to see with the naked eye. The symptoms of mite infestation are yellow speckles which turn silvery. Severely damaged leaves become bleached and drop. When the infestation of mites is high, webbing will be visible on the tips of the leaves and may hang down like a silken thread. This dispersal mechanism helps them move from one plant to the next on wind currents.

Treat with Grosafe Organic EnSpray 99® Insect Oil

Moss

Moss

Mosses are small flowerless plants that typically grow in dense green clumps or mats, often in damp or shady locations. Moss needs moisture to grow but can survive periods of drought. It is usually associated with poor drainage, shade, lack of necessary nutrients and/or acidic soil. You can treat the problem by addressing the causes and following up with a suitable fungicide.

Treat with Grosafe Lime Sulphur