• Treatment of bumblebee stings and allergies

  event of a fever occurring or a grade 1 reaction, contact a GP. The decision can be made to keep an eye on the situation and see how things go. A period [...] Usually a bumblebee sting leads to a non-allergic , local reaction: swelling, itchiness and redness at the site of the sting, lasting for only a couple [...] injected venom develops. The response to a bumblebee sting can differ per incident. The stinger of a bumblebee or a wasp has no barbs. This means that the

• Green peach aphid

  glossy. Winged individuals have a brown-black head and thorax and a yellow-green to green or even reddish abdomen. They have a dark brown spot on the abdomen [...] native, however it is now a pest with a world-wide distribution. The green peach aphid ( Myzus persicae subsp. persicae ) is a particularly polyphagous [...] Plant sap is rich in sugars, but has a low protein content. Aphids therefore need to extract large quantities of sap to get sufficient protein. The excess

• Privacy Statement

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• Black sigatoka disease

  infection takes a minimum of two or three days under optimal conditions (humidity close to saturation and temperature above 20 °C). How to prevent Black [...] of about one month old. The symptoms run parallel to the veins. Within a few days, the spots become a few centimetres in size and turn brown with light [...] infected leaves or at least stack them, so the spores cannot be discharged from the lower leaves in the stack Use under-canopy (drip) irrigation to reduce splash

• Asian citrus psyllid

  disturbed or over-crowded. Development from egg to adult varied from 14 days at 28°C/82.4°F to 49 days at 15°C/59°F. New adults reach reproductive maturity within [...] disease is spread when adults fly to a healthy plant and injects bacteria into it as they feed. The disease can kill a citrus tree in as little as five [...] distinct red eye spots at maturity. Eggs are anchored to plant tissue in an upright position, and large numbers of eggs may be found on a single spot. Nymphs

• Root rot of carrot

  nonsterile soil remained viable at 0°C and 3°C for 12 months, at 6°C for 6 months, and at 12°C for 2 months, indicating a capacity to overwinter in cold regions [...] circular to irregular spots on the leaves that vary in colour from grey to almost black. The spots appear to be sharply defined, but under a magnifying [...] simple morphological features hence is not easy to place it at the generic level. Årsvoll was the first to identify and describe the fungus in Norway, in

• Spider mites and other mites

  effective way to keep plant mite populations under control. Spider mite control videos Take a look at the video or go to our Youtube channel to see our spider [...] typically less than 1 millimeter in size, and range in color from pale yellow to green, brown, or red. They have eight legs and are closely related to spiders [...] of the plant. The number of eggs laid by a single female can vary, and they can hatch within a few days to a couple of weeks, again depending on environmental

• Cotton aphid

  population. Large individuals (up to 1.8 mm long) are usually dark green to black, while aphids produced in overcrowded colonies at a high temperature can be much [...] Plant sap is rich in sugars, but has a low protein content. Aphids therefore need to extract large quantities of sap to get sufficient protein. The excess [...] and disturb the balance of growth hormones. As a result, the plant’s growth is retarded giving rise to deformed leaves or, if the infestation occurs early

• Aphids

  cucumber. How to get rid of aphids Horiver Disc Chrysopa-E Ervipar Aphipar Aphid control videos Take a look at the video or go to our Youtube channel to see [...] has a low protein content but is rich in sugars. Aphids therefore need to extract large quantities of sap in order to get sufficient protein. As a consequence [...] form a single, very large group of insects: the super- family Aphidoidea, belonging to the order Hemiptera . The aphids discussed here all belong to the

• Leaf stripe

  does not occur at soil temperatures above 15 °C. How to prevent Leaf stripe Produce seed in semi-arid environments without irrigation, to decrease the chances [...] formed at the base of the leaf and the leaf sheath. They gradually extend and become brown and chlorotic and may merge. Eventually this leads to the death [...] infected leaves when humidity is high and wind-dispersed to neighbouring ears where they can infect seeds at any stage up until soft dough stage. Infection occurs