• Two-spotted spider mite

  empty dead cells become yellow, and in many plants the damage can also be seen on the upper surface of leaves as small yellow dots. The destruction of [...] transpiration and reduced plant growth. As damage increases, whole leaves turn yellow, and as more cell sap is removed, the leaf, and eventually the whole plant [...] that is rounded at the rear end. Their colour can vary from orange, light yellow or light green to dark green, red, brown, or almost black.

• Glasshouse potato aphid

  piercing by the aphids are visible in lower leaves in the form of yellow patches. Heavy yellowing may even be followed by defoliation. Life cycle Glasshouse potato [...] squat, of medium size (1.8 - 3.0 mm long) and oval in shape. It has a light yellow-green to brown-green colour, and has an overall shiny appearance. Antennae [...] on the abdomen at the base of the cornicles. Alate (winged) females are yellow-green, with a brown head, a dark thorax and a dark abdomen that has pale

• Chili pepper

  plants. The plant’s flowers are white and have a greenish white or greenish yellow corolla. The plant’s berries are very small (10–20 millimetres (0.39–0.79 [...] ical to lanceolate. The fruit (the peppers) usually develop from a pale yellow to a bright red when ripe. Varieties can come in other colours as well.

• Tobacco whitefly

  irregular ripening in tomatoes and sweet peppers, yellowing of the flower stalks in gerbera, and serious yellowing of the leaves of French beans. Other symptoms [...] stadia remain flattened on the leaf. The fourth larva stadium develops into a yellow, almost circular so called pupa, in which the red eyes and white wings of [...] greenhouse whitefly ( Trialeurodes vaporariorum ), but is slightly smaller and yellower. More distinctively, the wings of the tobacco whitefly ( Bemisia tabaci

• Oleander aphid

  winged adult females (alata) are yellow and black with dark wing veins while the wingless forms (apterae) are yellow with black cornicles, antennae, legs [...] its principal host plant, oleander. Damage symptoms The colonies of bright yellow aphids can easily be seen on the shoots of the host plants. The damage caused

• Black sigatoka disease

  symptoms Black sigatoka (Mycosphaerella fijiensis ) first causes small, light yellow spots or streaks on leaves of about one month old. The symptoms run parallel [...] centres. These spots enlarge further and the tissue around the lesions turns yellow and dies. Lesions merge and the whole leaf turns brown and ultimately dies

• Apple

  cultivated, each with their own characteristics. Ripe apples usually have a red, yellow, green, pink, or russetted coloured skin. Additionally there exists also [...] yellowish-white coloured exocarp. Sometimes their flesh is also pink or yellow.

• Horiver Wetstick

  Wetstick for trapping and monitoring of different flying insects. Pests Yellow: whitefly , thrips , fungus gnats, leaf miners Blue: thrips Black: Tuta [...] Polysterene cards coated with wet sticky glue. Available colours and sizes Yellow: 10x25 cm; 20x25 cm; 25x40 cm Blue: 10x25 cm; 20x25 cm; 25x40 cm Black: [...] absoluta use at least one Horiver Wetstick trap per 100 m 2 Combined use Yellow Horiver Wetstick can be used in combination with Natutec Scout for easy

• Melon thrips

  Damage symptoms Nymphs and adults are damaging stage. Infested leaves become yellow or brown, also acquire bronze colour, then crinkle and die. Damaged terminal [...] soil. There are two pupal stages viz., prepupae and pupae. Adults are pale yellow or white in colour and 0.8 to 1mm in length, with females slightly larger

• Lemon

  About Grown mainly for its juice, this well-known yellow citrus fruit is used widely for culinary and other domestic purposes throughout the world. Citrus