The station has undertaken elaborate studies on ginger. Out of the 31 varieties of ginger studies, Rio-De-Janeiro and Maran were found to be high yielding under rainfed conditions. Nadia and Thingpuri were found to be good for dry ginger production.
Highest percentage recovery of dry ginger was obtained from Maran. Rio-de-Janeiro, Assam, Kuruppampady, Valluvanad and Ernad varieties were superior with regard to oleo-resin content.
Organic amendments such as coconut oil cake, ground nut cake, sesame cake and cashew shell when applied to the soil to give nitrogen requirement of 50 kg/ha were found to reduce the soft rot incidence of ginger caused by Pythium aphanidermalum.
Bacterial wilt of ginger could be effectively controlled by oil drenching and foliar spraying with 1% Bordeaux mixture at monthly intervals two months after planting.
Studies on soft rot incidence of ginger indicated that seed treatment with captan 0.2% is effective in controlling pre-emergence rhizome rot.
Among the 33 varieties of turmeric evaluated, PTS-9 was found to be promising.
Detailed studies of the floral biology and fruit set of vanilla have been made and technique of hand pollination was standardised. It was found that 97.5% to 100% success by hand pollination could be achieved if it is performed between 6 am to 6 pm.
Among the different methods of curing of vanilla bears Mexican process was found to be the most suitable one under Indian conditions which gave the attractive chocolate brown colour, mild flavour and non-flexible texture, moderate shrinkage and 4.15 per cent vanilla.
The fungus which causes vanilla wilt was identified as Fusarium oxisporum. The disease could be controlled by sanitation, mulching and drenching with 0.5 per cent Bordeaux mixture.
All spice (Pimenta dioica) an important tree spices which jhas got the flavour and qualities of almost all the spices was found to be suitable for cultivation in Wayanad.
A high yielding variety of cardamom evolved by pure line selection from Malabar type, (PV-1) has been released for cultivation, from Pampadumpara.
Cultivation of cardamom under artificial shade has been found to be feasible and economical.
The best season for rooting of laterals of black pepper was found to be the last fortnight of June followed by first fortnight of July.
Coorg mandarin orange budded on rough lemon root stock was found to be better than other combinations with respect to growth, yield and quality of fruits.
Studies with 27 mango varieties available in the station revealed that Prior and Dasheri are high yielders (75 kg/tree/year) prior, Pairi and Bennet Alphonso were found to be early bearing.
Stone grafting was found to be the best method of vegetative propagation in mango.
Bodies Altafort, a table variety of banana has been found high yielding under rainfed and irrigated condition. This has been recommended as a variety in Package of Practices of KAU for large scale cultivation in the zone.
Planting Nendran Banana in August gave highest bunch weight (8.380 kg/bunch) followed by October (8.20 kg/bunch), September (8.10 kg/bunch) and July (7.83 kg/bunch) plantings.
September variety of cabbage has been found desirable and has been recommended for general cultivation in the zone.
Pureline selection suited to high range situations were made from local varieties and released as WND I & WND II.
Rice variety, Edavaka having high grain/straw yield, good grain quality and suited for both cropping seasons was developed at the station.
Time of planting of medium duration rice varieties have been standardised. Planting during the first week of August for the first crop and first week of January for the second crop was found to give higher yields. The results are being adopted by farmers in the district. The station was responsible for introducing 4th scented rice variety, Pusa basmati-1 in Wayanad and was found to be promising in Wayanad and can be successfully cultivated in Wayanad during first and second crop season.
In the rice based farming system, rice followed by ginger was found most remunerative, which is being adopted in the rice fallows in the districts.
- Essential Oils
Inter cropping trials in eucalyptus plantations with ginger, turmeric and lemongrass showed that the yield of oil was higher from plots where lemon grass and ginger were intercropped.
The results of pruning in eucalyptus indicated that maximum leaf and oil yields were obtained when plants were pruned at an interval of eight months. The percentage of recovery was found to decrease when pruning was done earlier or later.