1. What is the cut-off drill date for oilseed rape?
This depends on type and seed bed conditions. Hybrids could be drilled later than conventional varieties with 25/09/08 really being the last date.
2. What should I do about slugs?
The best control for slugs is a firm fine consolidated seed bed with the seed drilled at below 15mm. Pellet if this is not possible as attack is likely. Drier conditions favour Metaldehyde pellets in the dry form as these are cheaper. Be aware that the half life of the product is approximately 7 days in warm conditions. This means that a second application is likely to be necessary.
3. What should I be doing about losing IPU and Trifluralin?
The first thing to be concerned about is drilling and establishing the crop. It is likely that some IPU will be about and that suitable alternatives are available, all be it at a price premium for this autumn’s crops.
4. At what seed rates should I be drilling my winter crops? Always check Thousand Grain Weight and calculate taking into account seed weight, seed bed and likely germination. In crude terms winter barley is not very responsive to seed rate and values around 160-170 kg/ha are sufficient. Winter wheat guidelines are shown below.
Target Plant Populations
Sowing Period
Target (Plants/m2)
1-10th September
125
11-20th September
150
21-30th September
200
1-15th October
250
16-31st October
275
1st November onwards
300+
Target Plants/m2
125
150
200
250
275
300+
% Establishment
75
75
75
75
75
75
Thousand Grain Weight
Kg/ha
Kg/ha
Kg/ha
Kg/ha
Kg/ha
Kg/ha
34
57
68
91
113
125
136+
38
63
76
101
127
139
152+
42
70
84
112
140
154
168+
46
77
92
123
153
169
184+
50
83
100
133
167
183
200+
54
90
108
144
180
198
216+
58
97
116
155
193
213
232+
60
100
120
160
200
220
240+
5. Do I need to be putting on P and K?
Check the soil indices first. Levels above 2 are likely to yield without additional P and K BUT this is not a policy to pursue annually as within 2-3 years crops will become deficient.
*These figures and information are for guidelines only*