Onion thrips
Description Thrips tabaci and western flower thrips Frankliniella occidentalis are sap feeders. Common thrips as in the main image; Order: Thysanoptera, Family: Thripidae. They are...
What is nutrient conditioning?
Nutrient conditioning is the process of managing the nutrient content of seedlings in the nursery for optimal growth when they are transplanted. This sounds easy,...
The effect of light and temperature in plant growth (Advanced reading)
Light and temperature are two crucial factors in greenhouse hydroponics. Plants use a very small range (only about 5% of visible light) in the total...
Increase container size for higher yields early in the season
This is all about getting higher yields early in the season when you can get higher prices. It’s about going into the market with a...
Why do Green Pepper grow so slowly
If you have grown peppers with other crops, you might have noticed that green peppers grow slower than most others. Even the seedlings take about...
Are organically grown vegetables better – The real truth behind it all
There is a hype about organically grown vegetables or any other foodstuff for that matter. Here is the irony in it all, the people that...
What is the nutritional value of vegetables
The nutritional value of vegetables is easily answered by the popular media, just slam a couple of very average numbers next to a couple of...
Quality of vegetable crops
Quality is one of those elusive characteristics upon which so much depends but about which is so little known. The number of definitions for quality...
Tomato russet mite
Description Russet mites (Aculops lycopersici, Aculus lycopersici) are so small that a 14X hand lens is needed to see them. Because of their size, these...
Plusia looper
Plusia looper description Plusia looper, also known as Cabbage looper or more correctly Trichoplusia ni are light green caterpillars with white or pale yellow stripes...
American Bollworm
Bollworm description Bollworm, also known as tomato fruit worm or American Bollworm, Helicoverpa armigera, are small caterpillars (about 30mm long, slightly more than 1 inch)...
Common physiological disorders in cucumbers
Physiological disorders caused by low temperatures Low temperatures injury only occurs with fruit that are in storage (either in transit or in storage rooms). Small...
Pruning cucumbers in greenhouses
Selecting a cucumber pruning system The question arises which system should be used. Each system has its advantages and disadvantages according to the ability and...
Sweet potato whitefly
Sweet potato whitefly description Sweet potato whitefly (Bemisia tabaci, order Hemiptera and family Aleyrodidae) is a sap feeder. The adults are about 4-5mm long with...
Red spider mite
Red spider mite description Red spider mite, of the genus Tetranychus urticae, are sap feeders. Although there are several species of spider mites which attack...
