• Southern European marshland pyralid

  roses appear to tolerate larger numbers. Life cycle and appearance of Southern European marshland pyralid Adults of the European pepper moth ( Duponchelia [...] forewing. The end of the remarkably long abdomen bends upward almost vertically, with the abdomen of males often being longer than that of females. Another [...] such as celery, pepper and lettuce, and weeds. The secretive habit of the caterpillars of this species makes them very difficult to control with synthetic

• Diamond back moth

  young seed pods, causing loss of pods and seeds. Life cycle and appearance of Diamond back moth The oval and flattened eggs of the diamond back moth (Plutella [...] cases of severe infestation, entire leaves may be destroyed, leaving only the veins. The larvae feed also on the chlorophyll-rich green areas of stems [...] They are deposited singly or in small groups of two or ten eggs on both the upper and lower surface of leaves, preferentially in depressions, and rarely

• Buckthorn-potato aphid

  transmission of viruses. Life cycle and appearance of Buckthorn-potato aphid Aphids have a complex life cycle, with both winged and wingless forms of adults [...] n distribution and is a major pest of potatoes, where it also transmits viruses. It also attacks a large number of other crops, for instance sweet pepper [...] buckthorn. After emerging in spring, the aphids mainly feed on the underside of leaves of their summer hosts and start to reproduce parthenogenetically. Both wingless

• Northern Corn Rootworm

  adult Diabrotica barberi can feed on a variety of plants, their larvae survive exclusively on the roots of corn. This allows producers to control infestation [...] appearance (goose-necked) as the plants try to straighten themselves. Life cycle and appearance of Northern Corn Rootworm Adult Diabrotica barberi beetles are between [...] roots. Certain populations of this species have evolved a resistance to crop rotation through prolonged diapause; the eggs of “semivoltine” Diabrotica barberi

• Black bean aphid

  affecting production. Life cycle and appearance of Black bean aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great [...] regions, where it is a serious economic pest of beans. It is highly polyphagous, and attacks a wide range of other crops. Damage symptoms Economic damage [...] damage is caused through the transmission of plant viruses. Infestations start usually at the younger parts of the plant but can spread all over the plant

• Cabbage moth

  large numbers of leaves and their frass accumulates in the heart of cabbage, thereby lowering the commercial value of infested crops. Life cycle and appearance [...] have a light network of markings. First instar larvae of the cabbage moth (Mamestra brassicae) are gregarious, eating the edge of the leaves on which they [...] emerging from their pupae the female moths lay clusters of 20 to 100 eggs on the underside of leaves or elsewhere within the greenhouse structure. The

• Brown soft scale

  flowers and fruit of the host and reduce photosynthesis and respiration. Life cycle and appearance of Brown soft scale The scale of the female is flat [...] colour of the scale darkens as the female ages. The size, shape and characteristics of the female also vary with different host plants. The middle of the [...] symptoms The scales produce enormous quantities of honeydew. This is usually the first visible symptom. Because of this, C. hesperidum is often attended by ants

• Stable fly

  bunches of 25–30) in humid areas with large amounts of decaying organic matter, such as compost piles, hay bales, spilled feed and near the edge of silage [...] and can travel up to 20 km in search of new hosts. Damage symptoms Stable flies typically congregate on the legs of livestock to feed, and the population [...] hog cholera, and the protozoan trypanosomes that cause surra. Life cycle and appearance of the Stable fly Adult stable flies are between 5–7 mm in size

• Cannabis aphid

  states and parts of Canada. The cannabis aphid closely resembles the hop aphid ( Phorodon humuli ), to the point that microscopic analysis of the head is required [...] cucumber mosaic virus, hemp mottle virus and alfalfa mosaic virus. Life cycle and appearance of the Cannabis aphid Adult cannabis aphids are between 1.8–2.7 [...] common in North American hops production; there have been unconfirmed reports of Phorodon humuli developing on cannabis plants, as well. Damage symptoms The

• Japanese beetle

  foliage is the most common symptom of feeding by the adult. The beetles generally feed from the upper surface of leaves, chewing out the tissue between [...] roots of maize, beans, tomatoes, strawberries, nursery seedlings, or other crops reduces their vitality and yield and sometimes kills the plants. Life cycle [...] cycle and appearance of Japanese beetle Newly-laid eggs of the Japanese beetle are about 1.5 mm long, pearly white and oblong. They absorb water from the