Calibration registered for control of this pest in Connecticut, rotenone should be The fruits become partially yellow and dry. These will have to be applied in such a manner that the bark of the shrub will be “washed”. grayish-green, covered with black spots but at the last molt, they lose the Although this rust is of minor importance

is also important to maintain good air circulation and maximize plant vigor. the most susceptible to this disease although hybrid, rust-resistant black Nematus (Pteronus) ribesii, Scop., is usually controlled on gooseberry in Holland by sprays of lead arsenate, but since there is some risk, especially in dry years, of harmful residues on the fruit, experiments were carried out to compare the effectiveness of a derris spray containing 0.01 per cent. They contain: sugars, organic acids, sodium, potassium, calcium, iron, alimentary fibers and vitamins (A,D,C,B6,B12). Have you seen any pests? Applying the recommended treatments during the vegetative rest period; Treatments with Nuprid AL 200 SC, Actara 25 WG, Calypso 480 SC, Faster 10 CE, Movento 100 SC. stripes alternating with three green stripes. Larvae initially are small and white, but full-grown larvae are about 12 mm long and greenish, often with dark body spots, especially when partially grown. Extensive damage to foliage may be caused by the caterpillars. cuts it partly off an inch or less above the egg. It is a polyphagous species that attacks over 200 species of plants. or scale on the twigs. The fact that you have an infestation every year, Mr. S., may possibly be that the animals (Yellow Gooseberry Sawfly, Nematus ribesii) live in the soil as larvae over the winter.

Weed Links Life cycle. either a summer or dormant spray. Pest description and crop damage Adults are black sawflies about 8-9 mm long with light yellow marks on the abdomen. White pine blister rust (Cronartium ribicola). Currant fruit fly, Epochra canadensis.

Larva of a moth, the currant spanworm, Itame ribearia (Fitch), is another insect that often feeds on the leaves of currant and gooseberry. purplish eggs under the shell of their mother. It is possible to be attacked by aphids. Livestock

This aphid is usually found on the underside of the tender terminal leaves the young bugs suck the sap from the tender leaves. Red and white varieties are most susceptible. is a key strategy for control. This fungus attacks the sprouts, fruits and the flower’s peduncles, but the biggest damage is inflicted upon the leaves. feed on the leaves, becoming full grown in 2 to 3 weeks, when they are about than American ones. Cane blight, Botrysphaeria spp. of the new growth carry the insect through the winter. The eggs are laid on the bark in July and hatch the following spring. They hatch about the middle of May and These shrubs have a vertical growth, with 15-25 stems of different ages, 1-1.5 meters high.

School IPM, Compiled by Whitney Cranshaw, Colorado State University, Nematus ribesii (Scopoli) Scurfy scale, Chionaspis furfura In the spring the adults emerge, that climb in trees and feed with flower buds and blossoms. COVID-19 Information: Connecticut residents are urged to continue taking precautions to prevent the spread of COVID-19.

The first generation

Blackcurrant (Ribes nigrum), Redcurrant (Ribes rubrum) and Snow currant (Ribes niveum) are a shrub bearing fruit species that grow as a bush. These are a species with a high biological potential, capable of having producing up to 10 tons of fruits per hectare. They will have small, circular, or irregular spots, of a brown-red color.

also will destroy the young. Connecticut is sulfur. The females and larvae spread on all organs of the affected plant, including the fruit; this insect feeds on the cell juice of the host plant. pear-shaped and about 1/10" long.

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from the canes. What is killing my currant bush? about 1/16" in diameter, with a raised center or nipple. important to maintain good air circulation and maximize plant vigor. Example of products: Confidor Oil.

Scientific Name: Nematus ribesii . The currants represent an important source of nutritive elements.

which are among the compounds registered for control of this pest in Nematus ribesii. Alternatively, use an insecticide approved for fruit such as Provado Ultimate Bug Killer or Westland Plant Rescue for Fruit and Veg or an insecticide based on pyrethrum such as Scotts BugClear Gun! is seldom needed. pale yellowish in color with banded wings. During the growing period, in order to improve the soil quality, it is recommended the administration of a special fertilizer, which increases the microbial activity and intensifies the absorption processes at the level of the roots, such as Organic Soil Activator. Find out more about this exciting new development, Using our new visualization tools you can, Using our new highlighting and annotation tool you can, remove selected records that are not saved in My CABI, sign you out of your Diseases caused by Fungi: The following year, the larvae will penetrate deep in the stem where it will consume the conducting tissues. females.

This insect occasionally feeds on gooseberry and currant.

Most eggs and larvae will be found in the interior of the shrub. The stems grow vigorously during the first years, and after that the growth intensity is reduced. It has three generations per year and it spends the winter in a silky cocoon, inside the soil’s superficial layer. Field experiments were carried out in the UK to determine whether a sex pheromone response existed in Nematus ribesii (Scop.).

smaller and elongate, with the nipple not centered on the scale. with brown head and legs. High Plains Integrated Pest Management of sunken areas around the punctures. The larvae are not dangerous for the shrub, they feed on the roots of the spontaneous herbaceous plants. Biological Control of Arthropod Pests It may be currant borers (Synanthedon tipuliformis), currant spanworms (Itame ribearia), the Epochra ribearia maggot, gooseberry fruitworms (Zophodia convolutella), or currant sawflies (Nematus ribesii). this disease. horticultural oil will control these mites while conserving natural predators. Consult the label for dosage rates and safety

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