Naptalam

Tolerances are established for residues of the herbicide N-1-naphthyl phthalamic acid from application of its sodium salt in or on the following agricultural commodities: peanut hulls, 0.1 ppm; and cantaloups, cranberries, cucumbers, muskmelons, peanuts, peanut hay, soybeans, soybean hay, and watermelons, 0.1 ppm (negligible residues).

In the greenhouse, naptalamat 1.1 to 4.5 kg ai/ha antagonized activity of paraquat at 0.04 to 0.14 kg ai/ha in 14 of 16 rate combinations when applied to sicklepod. Sicklepod shoot fresh weight reduction was less compared to that obtained with paraquat alone when paraquat at 0.04 kg/ha was mixed with bentazon at 0.42 to 0.84 kg ai/ha or monocarbamide dihydrogensulfate at 14 to 58 kg ai/ha. Paraquat activity on Florida beggarweed was antagonized by mixtures of paraquat at 0.04 to 0.14 kg/ha with naptalam at 3.4 or 4.5 kg/ha.

Laboratory studies demonstrated that naptalam safens cucumber against the phytotoxic effects of chloramben. In petri dish studies, cucumber seedlings grown from seeds exposed to chloramben plus naptalam had greater shoot growth, root growth, and dry weight than seedlings grown from seeds exposed to chloramben alone. Naptalam also partially reversed the reduction in dry weight of various plant parts caused by exposure of roots of hydroponically grown seedlings to chloramben. More radioactivity from root-applied (14)C chloramben remained in cucumber roots and less was translocated to shoots wih a (14)C chloramben plus naptalam treatment than with a (14)C chloramben alone treatment. Naptalam appeared to influence chloramben metabolism. In various plant parts, concn of chloramben and its metabolites differed between the two treatments.

LD50 Anas platyrhynchos (Mallard) oral > 10000 mg/kg/8 days

LD50 Colinus virginianus (Bobwhite quail) oral > 10000 mg/kg/8 days

LC50 Lepomis macrochirus (Bluegill) 354 mg/l/96 hr

LC50 Salmo gairdneri (Rainbow trout) 76 mg/l/96 hr

Terrestrial Fate: In ... soil, degradation to 1-naphthylamine and phthalic acid.

TERRESTRIAL FATE: THE ANNUAL APPLICATION OF NAPTALAM TO CRANBERRY BOGS RESULTED IN A BUILD-UP OF NAPTALAM IN BOG SOIL. THE BOG SOILS THAT HAD RECEIVED ANNUAL APPLICATIONS OF 8-12 LB NAPTALAM/ACRE SHOWED THE MOST RESIDUE AT THE 0-4 INCH DEPTHS. FOR 8-10 LB NAPTALAM/ACRE, A STEADY STATE BETWEEN THE PERSISTENCE & BREAKDOWN OF NAPTALAM WAS REACHED AFTER 2 YEARS.

LEACHES RAPIDLY IN HIGHLY POROUS OR SILT LOAM SOILS OF EXTREMELY FINE TEXTURE. HEAVY RAINS IMMEDIATELY AFTER APPLICATION WILL CAUSE ... LEACHING ... .

Koc = 4 (calculated from water solubility by regression equations) /From table/

Terrestrial Fate: Absorption and leaching characteristics: Incomplete data indicate that naptalam is very mobile in a fine sand, a sandy loam, and a silt loam soil, and slightly mobile in muck soil. Retention of naptalam by soil is correlated with /cation exchange capacity/ CEC and organic matter content.

INHALATION HAS BEEN REPORTED TO CAUSE SLIGHT IRRITATION.

NO SKIN IRRITATION DESCRIBED IN MAN ... .

Hazards to humans statement: DANGER. Harmful if swallowed. Corrosive. Causes irreversible eye damage. Do not get in eyes or on clothing.

... LOW ACUTE TOXICITY IN RATS ... NO SKIN IRRITATION DESCRIBED IN ... ANIMALS.

SUBACUTE TOXICITY: 90 DAY FEEDING STUDY SHOWED NO ADVERSE EFFECTS @ 1000 PPM IN DAILY DIET OF RATS & NO ADVERSE EFFECT LEVEL OF GREATER THAN 5000 PPM IN DAILY DIET OF DOGS.

NAPTALAM WAS NOT TUMORIGENIC WHEN ADMIN ORALLY TO MICE (64-215 MG/KG/DAY). /FROM TABLE/

NO EVIDENCE OF MUTAGENICITY TO ESCHERICHIA COLI WAS FOUND FOR A VARIETY OF COMMERCIAL PRODUCTS INCL NAPTALAM.

For more Non-Human Toxicity Excerpts (Complete) data for NAPTALAM (11 total), please visit the HSDB record page.

As the federal pesticide law FIFRA directs, EPA is conducting a comprehensive review of older pesticides to consider their health and environmental effects and make decisions about their future use. Under this pesticide reregistration program, EPA examines health and safety data for pesticide active ingredients initially registered before November 1, 1984, and determines whether they are eligible for reregistration. In addition, all pesticides must meet the new safety standard of the Food Quality Protection Act of 1996. Naptalam is found on List A, which contains most food use pesticides and consists of the 194 chemical cases (or 350 individual active ingredients) for which EPA issued registration standards prior to FIFRA, as amended in 1988. Case No: 0183; Pesticide type: Herbicide; Registration Standard Date: 03/30/85; Case Status: OPP is reviewing data from the pesticide's producers regarding its human health and/or environmental effects, or OPP is determining the pesticide's eligibility for reregistration and developing the Reregistration Eligibility Decision (RED) document.; Active ingredient (AI): N-1-Naphthylphthalamic acid; AI Status: The active ingredient is no longer contained in any registered pesticide products ... "cancelled."

Tolerances are established for residues of the herbicide N-1-naphthyl phthalamic acid from application of its sodium salt in or on the following agricultural commodities: peanut hulls, cantaloups, cranberries, cucumbers, muskmelons, peanuts, peanut hay, soybeans, soybean hay, and watermelons.

Used as selective pre-emergence herbicide and analytical reagent for thorium and zirconium; [Merck Index]

Cancelled--no longer registered as a pesticide for use in the US; [HSDB]

Farming (Pesticides) [Category: Industry]

The active ingredient is no longer contained in any registered pesticide products ... "cancelled."

AS ANALYTICAL REAGENT FOR THORIUM & ZIRCONIUM

GIVES CONTROL OF PIGWEED, PURSLANE, LAMBSQUARTER, QUICKWEED, RAGWEED, CHICKWEED, FOXTAIL, CRABGRASS.

ALANAP-3 /IS/ AQ SOLUTION OF SODIUM SALT CONTAINING EQUIVALENT OF 22% COMPOUND AS ACID. /SODIUM SALT/

IT IS FORMULATED AS EMULSIFIABLE CONCENTRATE, WETTABLE POWDER, & GRANULES.

Alanap Plus (mixt of naptalam plus chloropropham), Solo (mixt of naptalam plus chlorpropham), Mor-Cran (mixt of naptalam plus chlorpropham) ... The sodium salt is the active ingredient in liq and granular Alanap and Peach Thin 322. It is also one of the active materials in Solo, Alanap Plus, and Dyanap. The others are chlorpropham and sodium dinoseb.

Naptro (dinitrophenol + naptalam)

Wettable powder - containing 90% active ingredient; Alanap-2 - wettable powder containing 90% active ingredient as imide; Alanap 10G - granules containing 10% active ingredient; Cyanap - combination 20.8% Naptalam, 10.5% Dinoseb, (Uniroyal and Ansul) used for peanuts; Mor-cran - mixture of alanap and CIPC (Uniroyal) used for cranberries; Solo - mixture of alanap and and CIPC (Uniroyal) used for soybeans; Ancrack - 2 lb naptalam plus 1 lb Dinoseb (Ansul) used for soybeans and peanuts; Peachthin 322 - 17.2% sodium salt used for thinning peach trees (Amdal Co, Abbott Laboratories).

WEED CONTROL USUALLY LASTS 3 TO 8 WK, DEPENDING ON SOIL & WEATHER CONDITIONS.

Year of initial registration: 1949.

Types and methods of application: Planter-mounted preemergence herbicide sprayer, aerial sprayer, or granular applicator. Applications may be preemergence, or postemergence in soybeans and cucurbits. One application per year, except on cucurbits, where there may be two. Application rates: For the liquid formulations, rates range from 2.0-6.0 lb. ai/acre, except on ornamental nursery stock, where 8.0 lb. ai/acre may be used. For the granular formulation, the rate is 4.3 lb ai/acre, except on cranberries, where 8.1 lb ai/acre may be used. Usual carriers: Water is the most common carrier for liquid formulations. /Former use/