Newly Posted Articles

LEAF TIP BURN: Phyllostictina pyrjformis

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Leaf-spotting fungus infrequent in Florida and not destructive but makes plants unsightly; tiny, slightly yellow spot, sunken, becomes larger, tan to dark brown; red to purple-black margin; round s... Read More

GRIFFOLYN: Insulation Sheeting

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A double plastic bonded to cross threads for durability allows about 90% light transmission; for example of application refer to A85-1324 Read More

LEAVES: Sunburn Treatment

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Saturate a large amount of water in a pail with sugar and cover the plant in it to seal the tissues from fungi and bacteria and stop dehydration; after an hour or two remove and keep the burned are... Read More

LEAVES: Testing for Virus

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The expert relies solely on visible symptoms on leaves where they are apparent; the lower portion of a maturing leaf in doubtful cases can be sent for instance to Florida West Coast Scientific Labs... Read More

LEAVES: Wrinkled, Especially the Front Ones

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago This indicates something seriously wrong with the plant; the beginning grower should check the roots and all cultural procedures. A72-117 Read More

LEAVES: Wrinkling on Cattleyas

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago This is caused either by overwatering or under-watering, so take your pick; disease is not likely to cause it; also, check the roots. A81-969 Read More

LIGHTS, ELECTRIC: Blue Lights

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Plants grow faster under them, up to 50 to 70% faster in a blue-light enriched environment; photoreceptors in leaves absorb the light and initiate opening of spores in the stomata; no reason given.... Read More

LIGHTS, ELECTRIC: Hours of Use

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Experiments indicate that using artificial light in the early morning in the greenhouse is a waste of money; instead, turn them on at 3 ofclock in the afternoon when the light is naturally strong; ... Read More

LIGHTS, ELECTRIC: In Greenhouses

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Two systems are treated, one as in an enclosed room area and the other as supplemental lighting in a greenhouse; analysis of sunlight and of various lamps given; photosynthesis sensitivity curve pr... Read More

LIGHTS, GROWING UNDER: Best Fluorescent Lamps

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Opinions vary but it was first thought that the "natur-escent" types of lamps were best but later experiments show that "Tru-Bloom" produced better growth. Hort. revs. 1983,5-289 Read More