Plant husbandry – Process
Patent
1981-06-08
1984-05-15
Bagwill, Robert E.
Plant husbandry
Process
47DIG11, 71 92, A01G 100
Patent
active
044479840
DESCRIPTION:
BRIEF SUMMARY
This invention relates to the treatment of plants and compositions for such treatment.
A large number of leguminous plants, such as oilseed rape, peas and beans, are grown principally for their seed. These seeds are formed in pods which, on ripening, split along their longitudinal axes. As a result, the seeds fall onto the ground. Where such crops are mechanically harvested, the problem of seed lost by premature pod splitting can be a serious economic problem. Oilseed rape, which is invariably harvested mechanically, has a strongly marked tendency for its pods to split either just before or during harvesting.
In addition to leguminous crops, the seeds or seed-bearing heads or bodies of ornamental plants, cereals (especially barley), grasses grown for seed production and vegetables being raised for seed all suffer from premature loss of seed before harvesting.
In accordance with the present invention, the loss of seed through premature release or scattering is controlled by the treatment of the crop plant, after seed body formation, with a coating or layering substance that will prevent the detachment of the seed or seed body or will control the splitting of pods or seed-bearing bodies. The treatment is usually carried out not more than fifteen days before the crop is ready for harvesting, which distinguishes the treatment of this invention from that in prior Applications Number PCT/GB 80/00016, European 8032353.0 and UK 8,022,640, in which coating agents are usually applied at least fifteen days before harvest.
Substances that may be used for this purpose must not affect the subsequent germination of seeds that are destined to be planted. Of particular value are a group of pinolene products based on di-1-p-menthene under a variety of trade names including Miller Aide, Miller Gard, Nu-Film P, Nu-Film 17 and Vapor Gard. These products, which contain di-1-p-menthene and certain of its polymers, further polymerize to form a film, and such further polymerization may take place or even be induced before application. Other monoterpenes of formula C.sub.10 H.sub.16, which correspond to two isoprene units, can also be used.
Pinolenes are naturally occurring substances and are both expensive and in short supply in relation to possible agricultural needs. It is therefore useful to extend them by using them in combination with other coating agents. Such compounds or mixtures of coating agents (which may be polymerized before application) can show properties unlike those of their individual components. The mixtures contain from 2 to 10 coating agents, one or more of which is preferably a pinolene compound although mixtures without such compounds may be used.
Apart from the monoterpenes mentioned, the following compounds are suitable, though this is not an exhaustive list: (sesquiterpenes) (diterpenes) (triterpenes) oxygenated derivatives) such as .alpha. and .beta. pinene, d-camphor, d-borneol, d-tanacetone, .beta.-thujone, d-.DELTA..sup.3 -carene hydrogenated castor oil, lauric acid, oil-free, saturated acid and synthetic fatty acid types oil types, epoxide-resin-modified, isophthalic-acid-based types, linoleic-rich oil type, linseed oil types, linseed oil/dehydrated castor oil types, linseed oil/soya bean oil types, linseed oil/tung oil types, maleic-resin-modified, marine oil types, phenolic-resin-modified, rosin-modified, safflower seed oil types, silicone-resin-modified, soya bean oil types, soya bean oil/tung oil types, styrenated types, sunflowerseed oil types, tall oil types, tobaccoseed oil types, unmodified types, vinyltoluene-modified and water-soluble types anhydride and butadiene/styrene copolymer resins linseed oil/rosin types, phenolic-resin-modified, soya bean oil types, styrenated types, vinyltoluene-modified, unmodified types, epikote 828 and epikote 1001 formaldehyde condensates mixtures both rosin or modified rosin resole condensates adducted to rosin or modified rosin, as well as phenol/formaldehyde resins modified by hydrogenation, polymerization isomerization or disproportionation with glycerol,
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Hutchings Neville
Sampson Michael J.
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