Slide 1: Propagation methods in seedless verities Slide 2: Guava
Propagation methods in seedless varities Guava; : Guava; The guava may be propagated by cuttings, grafting, air layering,ground layering.
Veneer grafting, T-budding, Forkert budding are some of the other methods of propogating guava. Preparation of cuttings : Preparation of cuttings Hardwood ,semi hardwood and softwood cuttings of guava.
The cuttings were made of uniform size 25cm long having four buds and two leaves. Air-Layering : Air-Layering Air-layering is the commercial method in practice for propagation of guava.
The most ideal time for air layering in guava is between April and June in the warm and humid climate, when the average temperature varies between 29.3 and 30.5°C and relative humidity between 69.0 and 80.0 per cent. ground layering : ground layering Slide 8: A shoot from previous year's growth of 1cm in diameter is selected for air-layering. A ring of bark about 3cm long is removed.
This area is covered with wet sphagnum moss and tied with polyethylene film. The rooting takes place in about 30-40 days Indonesian Seedless White Guava - (Air-Layer) : Indonesian Seedless White Guava - (Air-Layer) Grapes; : Grapes; Layering : Layering The first method is called layering. Types of layering include tip, simple, compound, air, mound and trench.
A good link to further demonstrate layer types is found at Grape layering is often used to replace a vine.
Some of the canes are allowed to lie on or touch the ground and then partially covered with soil. Slide 12: The end should be exposed and allowed to grow.
Roots should form on the stem buried under the soil.
The newly rooted cane is separated from the mother plant and replanted. Hardwood Cuttings : Hardwood Cuttings For obtaining hardwood cuttings, 3-4 year old disease free vigorously growing mature vines, which has produced a good crop in the previous year should be selected after October pruning.
Cuttings from very young and very old vines or those subjected to heavy fruiting during the previous year should be avoided. Slide 15: 30-45 cm long cuttings of pencil size thickness with atleast 3-4 nodes are cut from the middle portion of the selected canes.
A cut should be made straight across 1cm below the node at the lower end of the cuttings, while slanted cut at the top is taken 2-3 cm above the bud. Slide 16: The cuttings are then immediately planted in bed or in polythene bags in the nursery. In case of delay in planting, the cuttings are stored by burying in moist sand or sawdust at 5 -7.5° C. Slide 19: Cuttings can also be planted in polythene bags. Polybags (25x15 cm and150-200 gauge) are filled with a mixture of soil, sand and FYM in equal proportion along with Superphosphate.
One or two cuttings may be planted in each bag. Preventive sprays to control common diseases are given during the growing period. Chip Budding : Chip Budding Chip budding is the best method for propagating vines on rootstocks. In this method a wedge-shaped piece containing the bud (chip) along with a portion of wood is removed from the desired variety.
The scion buds should be plump and taken from well-mature healthy canes, equal in maturity level and thickness to that of the rootstock. Rootstocks : Rootstocks Of late due to some soil borne problems such as nematodes, soil salinity and drought, use of rootstock has been felt essential.
The following rootstocks have been identified for combating the soil/ climate related problems and also as a potential tool for manipulating the vine growth and productivity- Slide 23: Purpose/Rootstock
110 Richter, 140 Ruggeri, 1103 Panlsen, SO 4 and St. George.
tolerant Dogridge, 1613, Ramsey and 140 Ruggeri.
resistant 1613, Dogridge, Salt Creek (Ramsey), Harmony and Freedom. Watermelon; : Watermelon; Slide 25: Thank you