• Tobacco whitefly

  into a yellow, almost circular so called pupa, in which the red eyes and white wings of the adult are already clearly visible. These pupae are found on [...] feed on plant sap very soon after emerging. The insect is covered with a white waxy substance. The adult of the tobacco whitefly ( Bemisia tabaci ) closely

• Crazy roots, hairy roots, crown gall

  All four species cause the growth of galls on the stems, which are first white and later turn brown. Only Rhizobium radiobacter causes galls and tumours

• Rose aphid

  Aphids moult four times before reaching adulthood. With each moult they shed white skin, betraying their presence in the crop. Wingless females of the rose

• Large blackberry aphid

  Aphids moult four times before reaching adulthood. With each moult they shed white skin, betraying their presence in the crop. Wingless females of the large

• Large raspberry aphid

  Aphids moult four times before reaching adulthood. With each moult they shed white skin, betraying their presence in the crop. Wingless females of the large

• Common cockchafer

  four longitudinal ribs each. The abdomen is black, with typical triangular white spots below the elytra. When just laid, the oval eggs of the common cockchafer

• Boisduval scale

  discolouration. Life cycle and appearance of Boisduval scale Females are white to light yellow, thin and semi-transparent, approximately 1.2-2.2 mm in diameter

• Shore fly

  are laid singly and are bean-shaped. A first instar larva is translucent white. Second instar larvae are brownish, less translucent and their body is c

• Mottled arum aphid

  Aphids moult four times before reaching adulthood. With each moult they shed white skin, betraying their presence in the crop. Reproduction of the mottled arum

• Pear psylla

  Adults pear psyllas are 2-3 mm long and orange red to blackish. They have white, longitudinal stripes on the back of the thorax. Their forewings are clear