Bacterial spot

spots may merge with lesions on the petioles and stems and form long dark streaks. On fruits, first small black specks are seen on green fruits. The specks [...] are also round and small to start with and slightly raised from the leaf surface. They occur on the abaxial (underside of) leaf surfaces and may enlarge into [...] which become rough and light brown. On fruits the spots are first small, circular and green but they turn brown, become raised and look like cracked scab

Glume blotch

pycnidia and perithecia occur. Perithecia are also formed on dead glumes and stems. In case of severe infection , the heads of wheat become black and the kernels [...] (Phaeosphaeria nodorum) is a fungal pathogen of wheat , barley and ryethat induces yield and quality losses. Damage symptoms Phaeosphaeria nodorum or Septoria [...] kernels become shrivelled and deformed. When germinating seedlings are infected, they shrivel. Life cycle and appearance of Glume blotch Phaeosphaeria

Gummy stem blight

feasible in high-wire crops) Pick and remove dead and diseased leaves Prevent plant diseases by optimizing plant potential and crop resilience. [...] on the foot and higher up on the stem. On the lesions, golden-brown gummy drops occur, hence the name gummy stem blight. On the lesions, black specks, the [...] mature fruits. The symptoms on stems, leaves and inside the fruits may occur together or individually. Life cycle and appearance of Gummy stem blight Mycosphaerella

Obscure mealybug

the crop in various ways: Nymphs and females extract the sap from the plant, stunting growth and causing deformation and / or yellowing of leaves, sometimes [...] are yellow-brown and not yet covered with wax. They are actively mobile and known as ‘crawlers’. Second instar nymphs are darker and less active. From [...] defoliation. The overall effect is a reduction of photosynthesis and therefore the yield. Flowers and fruit often drop off. Plant sap is rich in sugars, but low

Horiver Drystick

Drystick for trapping and monitoring different flying insects. The traps work particularly well for bugs such as Lygus spp. and Nesidiocoris tenuis. Pests [...] Whitefly , Nesidiocoris tenuis White: Lygus spp. Mode of action Insect pests are attracted to the colour of the sticky trap and get caught in the glue. Pr [...] cards coated with dry sticky glue. Available colours and sizes Yellow: 10x25 cm; 25x40 cm White: 10x25 cm; 25x40 cm Numbers per package 10x25 cm: 10 pieces

Asparagus

‘green asparagus’ and ‘white asparagus’. To produce white asparagus, the shoots are not exposed to the sun (they are covered with soil) and without this exposure [...] like the related Allium species of onion and garlic. Nowadays the onion-like plants belong to the Amaryllidaceae and asparagus are classified as Asparagaceae [...] plant in most of Europe, western Asia and northern Africa. Commercially it is an interesting vegetable crop and it is extensively cultivated. Asparagus

Crane flies

soil in late summer to fall, and females mate and lay 200-300 eggs. Larvae emerge within one week and then feed on roots and crowns of grasses during the [...] leatherjackets, live in the soil and feed on roots and shoots (which they pull into the ground of mainly grasses and cereal crops. The adults do not cause [...] have long, spindly legs and one pair of narrow, clear wings with clearly visible veins. Eggs are black in colour, oval, 1mm long and deposited on the soil

Woolly apple aphid

sticky masses of “wool” may contaminate leaves and fruits and can be a nuisance at harvest time. Life cycle and appearance of Woolly apple aphid In contrast [...] aphid are 1.2-2.6 mm long, purplish brown and covered by masses of white, mealy wax. The siphunculi are pore-like and the cauda is small. Eriosoma lanigerum [...] origin and has been distributed to other parts of the world mainly via infested apple rootstocks. It can occasionally also be found in pear, quince and a few

Bacterial canker of tomato

on stems, leaves and fruits. Leaves and shoots wilt. On the lower leaves, blister-like white lesions occur, which later turn brown and may merge. The leaves [...] the name ring rot. Life cycle and appearance of Bacterial canker of tomato Clavibacter is seed-borne and tuber-borne and primary infection is mostly from [...] protective clothing and gloves, disinfect tools and greenhouse structures Use a crop rotation in field crops of at least two years and alternate with a non-host

Citrus mealybug

distribution and many and diverse host plants. In temperate regions of the world this mealybug poses a problem in greenhouse horticulture, and in the tropics [...] croton and kalanchoë, but also in roses and gerbera. Additionally, the citrus mealybug ( Planococcus citri ) can also appear in cucumber, melon and aubergine [...] the crop in various ways: Nymphs and females extract the sap from the plant, stunting growth and causing deformation and / or yellowing of leaves, sometimes