An extract from my website;
http://www.thegardenersamanac.co.uk * Week 12; Apply Sulphate of potash at a rate of 20gms (3/4 oz) per sq metre
* Week 16; Apply fungicide at flower bud stage onwards, to prevent mildew.
* Week 19; Deter infestations of Gooseberry sawfly larvae (maggots) by spraying the plants with a suitable pesticide after flowering.
* Week 29; Check for ‘gooseberry sawfly’, and spray with a suitable pesticide if necessary
An application of a systemic fungicide will help to combat mildew infections.
Remove any suckers springing up from the roots, and prune back side-shoots to leave five pairs of leaves.
* Week 32; Dont neglect gooseberries after fruiting for they can come under sudden attack from pests and diseases.
Up to four broods of sawfly larvae (caterpillars) can hatch in a year, so continue spraying with suitable products
Treat powdery mildew infections with a systemic fungicide.
Other jobs that can be tackled now include removing any suckers growing out from the roots or main stem.
Summer prune by shortening all sideshoots made this year back to five leaves to allow in more light and air to centre of plants.
* Week 35; Gooseberries may be increased by means of hard wood cuttings inserted into the ground.
* Select sturdy prunings of ripened (firm) current years growth 300-400mm (12”-15”) long
* Trim the top, just above a leaf bud and bottom below a leaf bud and rub off all but the top three or four buds at the top.
Insert 150mm(6”) apart in a sand lined slit or trench so that the lowest bud is positioned 50mm (2”) above soil level,leaving two buds above soil level.
To assist the rooting process dip the cutting in a rooting powder or gel.
Inserting cuttings through black plastic sheeting will also help.
* Week 44; Cut back shoots of two-year old gooseberries by about a half, pruning them back to a suitable bud.
Cut back to an inside (upper) bud if the variety has a drooping habit, or to an outside (lower) bud for erect growers.
Slightly older bushes can be treated similarly, but here the laterals (side shoots) may also need shorting back to about 75mm (3”).
Established bushes may benefit from having weak shoots and a proportion of older branches pruned out to avoid congestion.