Category: Orchid Doctor

NATRIPHENE WP: Soak

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For bud ailments on paphiopedilums, use as a soak for the entire plant in 1:2,000 for 15 to 30 minutes. A72-534 Read More

NATRIPHENE WP: Soaked Plants Apparently Lost Their Roots

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A one hour soaking is not normally toxic. A78-909 Read More

NATRIPHENE WP: Sodium Orthophenylphenate

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Is used as a dip for the control of Phythium ultimum and Phytophora cactorum, and bacterial pathogens. AH15 Read More

NATURAL HYBRIDS: In European Terrestrials

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For a review of them see A84-130 -- when selfed = do they always breed true and if so why: if not, how else can the botanists tell a natural hybrid; they can cross the supposed parents and check th... Read More

NECROTIC SPOTS: On Phalaenopsis, Mature Plants; What Treatment?

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is possibly Pseudomonas cattleyae, a bacterial disease; remove the leaves and spray monthly with Physan 20. A79-455 Read More

NECROTIC STREAKS AND PITS: Caused by Cymbidium Mosaic Virus

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It affects cattleyas, epidendrums, laelias, phalaenopsis, lycastes, miltonias, oncidiums, vandas; in the early stage it resembles false spider mite injury; there is no remedy. A73-818 Read More

NECTARS: "honey" Exuding Around Flowers

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is associated with good culture. A73-1081; an adaptive mechanism enabling plants to avoid excessive carbohydrates resulting from enhanced photosynthesis. A67-468; the "honey" contains 97% sucros... Read More

NECTARS: Cause of Exudate on Sheaths

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It varies from plant to plant; generally considered to be a sign that plants are making vigorous growth. A63-1011; "sooty mold" fungus turns the exudate into black smudges but does no harm; wash it... Read More

NECTARS: Production of Nectars on Plants as Exudates

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Floral and extra-floral exudates contain sucrose, fructose and glucose, but no exotic sugars. A71-1092; they occur more often where there is a big change from day to night temperatures. F74-33 Read More

NEEM TREE: Source of a Chemical Abstract Used as Pesticide

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A natural product called Margosan-0, sometimes used by orchidists, has an active ingredient: azadirachtin which repels insects, affects their feeding or deregulates their hormones. F87-57 Read More