• Tea spider mite

  January 1, 1970

  leaves and occasionally on petioles. Red spider mite attacks the upper surface of the mature leaves. Infestation starts all along the veins and midrib [...] blood red colour eggs are laid all along the veins and mid-rib on upper surface of the leaves. Freshly hatched larva is yellow orange and the larval period

• Cotton aphid

  January 1, 1970

  in overcrowded colonies at a high temperature can be much smaller (from 0.9 mm), and yellow or cream-coloured. Cotton aphids have red eyes and relatively

• Two-spotted spider mite

  January 1, 1970

  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 cells results in reduced [...] may die. In tomatoes and cucumbers, as little as 30% damage of the leaf surface can lead to loss of the crop. The nymphs and adults also produce webs, and

• Tomato leafminer

  January 1, 1970

  the dorsal surface. Caterpillars can temporarily be found outside the leaf mines or fruit. Pupation takes place in the soil or on the surface of a leaf

• Citrus leaf miner

  January 1, 1970

  Life cycle and appearance The moth lays the eggs singly up to 50 on lower surface of the leaves near the mid-rib. The caterpillar enters the leaf tissue after

• Black sigatoka disease

  January 1, 1970

  and either develop into conidiophores with new conidia or grow across the surface and infect adjacent stomata. Both types of spores can germinate within two

• Downy mildew of Cucurbits

  January 1, 1970

  occasionally also stems and fruits. They cause lesions on the upper leaf surface, bordered by the veins, which are first yellow and then turn brown. On the

• Blight of pepper

  January 1, 1970

  attract the zoospores. The pathogen grows into the stem and on the plant surface and new sporangiophores (structures containing sporangia, a type of spores)

• Apple collar rot

  January 1, 1970

  attract the zoospores. The pathogen grows into the stem and on the plant surface and new sporangiophores (structures containing sporangia, a type of spores)

• Broad mite

  January 1, 1970

  the underside of the leaf or on the fruit surface. The elongated, oval eggs are firmly attached to the surface and are rather large (about 0.07 mm) compared