herbicide

(redirected from Sulfentrazone)
Also found in: Dictionary, Thesaurus, Encyclopedia.

herbicide

 [her´bĭ-sīd]
an agent that is destructive to weeds or causes an alteration in their normal growth.

herb·i·cide

(ĕr'bi-sīd)
Any chemical compound designed to kill plants. Herbicides have been used in military operations for deforestation, but the U.S. military excludes herbicides from being classified as chemical-warfare agents.

herbicide

any chemical that kills plants. Herbicides can be highly selective. For example, 2,4-D only kills DICOTYLEDONS (broad-leaved plants), leaving MONOCOTYLEDONS unharmed.
References in periodicals archive ?
Plants in E1 treated with sulfentrazone (300 g [ha.sup.-1]) had 3.4% of injuries, reduced size, and leaf chlorosis.
Regarding the post-emergence herbicides, Lactofen (120 g ha-1) + chlorimuron (12.5 g [ha.sup.-1]), and lactofen (120 g [ha.sup.-1]) caused the greatest injuries to soybean plants at 7 [DAA.sub.POST] in all combinations with the pre-emergence herbicides (S-metolachlor, diclosulam, sulfentrazone), and with no application of pre-emergence herbicide.
Additionally, based on the low levels of injury following application of both metribuzin and sulfentrazone, it is likely that the variety chosen for these studies was tolerant to these herbicides.
Herbicide log [K.sub.PW] Sol (c) [K.sub.OW] (a) (b) Ametryn 2.63 31.5 0.2 clomazone 2.5 42.34 1.1 Diuron 2.85 88.14 0.0364 hexazinone 1.2 9.4 33 metribuzin 1.6 17.7 1.05 Simazine 2.1 21.13 0.0062 sulfentrazone 1.48 20.2 110 tebuthiuron 1.79 13.02 2.5 (a) log [K.sub.OW] partition coefficient octanol-water of herbicide (L [kg.sup.-1]) (TOMLIN, 2000).
The sulfentrazone results were not satisfactory even in the wet season with the 100% dose for the sandy-clay-loam soil, whereas only diclosulam, sulfrentazone, tebuthiuron and trifluralin showed not satisfactory results with the 50% dose (Table 3).
Para os herbicidas testados, as doses do produto comercial foram: 0; 1,5; 3,0 e 6,0 L [ha.sup.-1]para o ametryn, 0; 1,6; 3,2 e 6,4 L [ha.sup.-1] para o diuron e 0; 0,4; 0,8 e 1,6 L [ha.sup.-1] para o sulfentrazone.
O sulfentrazone e um herbicida pre-emergente do grupo quimico ariltriazolinonas, que atua inibindo a enzima protoporfirinogenio oxidase, um intermediario importante na sintese da clorofila em plantas (Jacobs & Jacobs, 1987; Reddy & Locke, 1998).
Aos sete dias apos a emergencia do girassol, os maiores niveis de injuria foram observados nas plantas cultivadas nas areas que receberam a aplicacao de imazaquin, diclosulam, sulfentrazone e imazethapyr (0,100kg [ha.sup.-1]) (Tabela 2).
No Brasil, o anidrido naftalico aplicado nas sementes de aveia branca para o controle de azevem nao diminuiu a fitointoxicacao da cultura em reposta aos herbicidas diclofop-methyl, sulfentrazone, isoxaflutole e clomazone (RIZZARDI & SERAFINI, 2001).
A aplicacao de sulfentrazone no estadio fenologico R3 ou no R5 reduziu a area foliar, o acumulo de materia seca total e nos orgaos, a altura da planta e o comprimento de raizes (ARRUDA et al., 1999).