When houseplant (indoor plant) leaves turn yellow, it’s usually one of the first symptoms indicating that the plant is stressed. If the conditions causing the plant stress are not alleviated, the yellow leaves may eventually turn brown and drop. Plant stress can be caused by […]
Horticultural oil, also known as white oil, is an easy and inexpensive pesticide to prepare at home from readily-available materials. It is used to control scale, aphids, mealy bug, citrus leaf miner, mites and caterpillars on roses, ornamentals, citrus and other fruit trees. The commercial […]
Many warm-season crops, such cantaloupe, capsicums, chillies, cucumbers, eggplants, lima beans, pumpkins, squash, tomatoes, and watermelon, are native to subtropical climates, and are therefore very frost-sensitive. They prefer temperatures of 21°C (70°F) to 35°C (95°F), and need daytime temperatures above 15.5°C (60°F). A week of […]
Odor repellent (scent repellent) products are an effective way of deterring unwanted pest animals from visiting the garden and causing damage. They either contain ingredients which pest animals find offensive and objectionable, or those that evoke an instinctive reaction of fear in pest animals, because […]
The feijoa (Acca sellowiana), commonly known as pineapple guava, is an evergreen fruiting shrub or small tree from the Myrtaceae family, that is native to South America. It is widely grown in the subtropics and in warm temperate areas. This remarkably hardy plant is quite […]
One common gardening myth is that watering plants on a hot, sunny day will scorch their leaves. Is this a fact or a fallacy? There appears to be no information published by university agricultural extension agencies, or in the horticulture literature, to support this idea. […]
European earwigs are usually considered to be garden pests, but they rarely damage leafy green vegetables. When they do, they leave many rough irregular holes with a shredded, jagged appearance in the leaves, much like snail and slug damage. They also chew leaves around the […]
Snails and slugs are one of the most destructive garden pests, causing extensive damage to seeds, seedlings, leaves, fruit and tubers. They go about unseen because they only come out at night or on rainy days to feed, and hide during the day. The damage […]
Spring is the time when the weather warms up, and nature springs to life. Fruit trees flower and put out their new leaves ready for the growing season. Sugar rich sap rises from the roots of fruit trees to fuel the new season’s growth. Gardeners […]
The European earwig (Forficula auricularia) is one of our most common earwigs found worldwide in gardens. These insects are scavengers, and they are omnivores – they are voracious feeders on soft-bodied insects such as aphids and insect eggs, they also prey on mites, spiders, and […]
Glyphosate (chemical compound N-phosphonomethyl glycine), also known by the trade name of Roundup, is a non-selective, post-emergence, broad-spectrum systemic organophosphate herbicide used for control of annual and perennial plants. This weedkiller is the largest selling herbicide chemical in the market today, and the most used […]
The active ingredient in herbicides used specifically for killing trees and tree stumps is triclopyr butoxyethanol ester (triclopyr BEE), which is NOT safe to use around ponds, lakes, rivers, streams, any other waterways or bodies of water. The product leaflet for Triclopyr 600 Herbicide issues […]
Over the last decade, there have been increasing reports from gardeners that their vegetables and flowers have been damaged or killed after adding manure or compost to their gardens, or when they’ve planted into new soil they had delivered. In fact, the problems of contaminated […]
The annoying little flies often seen flying around indoor plants are fungus gnats. The adult flies are just a nuisance, but their larvae, which mainly eat fungi growing in decomposing organic matter (such as over-watered plant potting mix!) will also eat the roots of houseplants, […]
When leaves of a citrus tree curl evenly along their length, this is a protective response to minimises leaf surface area in order to reduce moisture loss. It indicates that the roots of the tree can’t supply enough water to support the leaves. This form […]
Tightly curled, yellowing, distorted, and diseased-looking young leaves at the tips of the branches on stone fruit in spring, mainly on cherry and plum trees, is a sign of damage caused by aphids. What are Aphids? Aphids are small sap-sucking pests insects around 2-4 mm […]
Ants can be a major pest in the garden because they ‘farm’ aphids and scale – they safeguard them in their nests over winter, then bring them out in spring and carry them onto the new plant growth, then collect the honeydew that aphids and […]
When cabbages are first planted they initially produce lots of large broad leaves, but in the latter part of their growing season the inner leaves at the centre of the plant begin curling inwards and cupping around a short-thick stem, growing tightly together to form […]
Land Cress (Barbarea vulgaris) and American Upland Cress (Barbarea verna) are biennial, edible leafy-green vegetables from the Brassicaceae (cabbage) family. The young leaves, which are spicy in flavour, are often used as a substitute for watercress in dishes, and can be cooked, or used fresh […]
Many gardeners are familiar with the experience of lifting the lid off a compost bin and seeing a cloud of small flies rise into the air in front of them. These little flies are vinegar flies or drosophila, and the reason why they’re found in […]
