Herbicide causes

Incorporating allelopathy into agricultural management may reduce the use of herbicides, cause less pollution, and diminish autotoxic hazards. Authentic inhibitors isolated from plant material have been subjects for examination in, vitro, but attempts to compare their effects in soils are limited. Soils contain a heterogeneous collection of organic matter of various origins. 

Chance is a far more likely explanation for the occurrence of four cases of neural tube defects among the Ranch Hand children as compared to zero cases among the Comparison children, just as it is the most likely explanation for the occurrence of five cleft lip/cleft palate cases among the Comparison children and their absence from Ranch Hand children. The alternative explanation that herbicides cause spina bifida and prevent cleft lip/cleft palate is not at all credible. 

Leptospermone (72) is an allelochemical produced by the bottlebrush plant (Calispermon spp.).46 This compound is herbicidal, causing bleaching symptoms, and is a potent inhibitor of HPPD. The triketone-type HPPD-inhibiting herbicides such as sulcotrione (73) were developed based on the structure of... 

Bidstrup (1952) described a case in 1952 of 3,5-dinitro-ortho-cresol, used as a herbicide, causing a feeling of well-being and abounding energy in one agricultural worker. 

The degree to which carbamothioate herbicides cause microbial adaptation depends on specific herbicide structure (lj), 21 22). Vernolate and EPTC have similar structures and soil exposure to either herbicide fully affected the degradation of the other. 

Using flavine mononucleotide (FMN) as electron acceptor, the herbicides caused a decrease in ATP formation, while it did not decrease when N-methylphenazonium (PMS) was used for the same purpose. 

BIOLOGICAL PLAUSIBILITY OF PHENOXY HERBICIDES CAUSING CANCER... 

Many of our best and most economical herbicides cause soil carryover, foliar injury, or other selectivity problems which can be remedied by developing resistant crops. 

Univ., China) presented his recent research results entitled Structure-activity relationship of novel sulfonylurea inhibitors on AHAS . H. Matsumoto (Univ. of Tsukuba, Japan) then introduced his study Mode of action of several classes of herbicides causing photooxi dative injury in plants . The second one dealt with insecticides, where X.-H. Qian (East China Univ. of Science and Technology, China) and K. Matsuda (Kinki Univ., Japan) presented their recent findings on chemistry and biochemistry of neonicotinoids. Interchange between Pesticide Science Societies of Korea and Japan was also maintained at a seminar entitled Current and future R D activities in agrochemical area in Korea and Japan . 

These herbicides cause moderate to severe injury to a variety of broad leaf and grassy weeds, both pre and post-emergent. 

Dalapon (2,2-dichloropropionic acid Suneson and Jones, 1960), a herbicide, causes deviating phenotypes in later generations. 

In this work, the effect of both herbicides on growth, photosynthetic activity and pigments, and N fixation in Vicia faba have been studied. We have tried to find out a) whether methabenzthiazuron caused the same "physiological effects in V. faba as in cereals (3) and b) if both herbicides caused the same effects on V faba in spite of their different herbicidal action. 

In the whole plant studies, pyrazolate or pyrazoxyfen was treated to roots of rice and early watergrass when their second leaves were fully expanded. Both herbicides caused severe growth retardation and bleaching on the third leaves of early watergrass while no effect on rice (data not shown). 

Many herbicides cause membrane disruption, usually as a secondary effect, and this destroys the integrity of the transport systems, particularly... 

Ethofumesate and fluridone are slightly more lipophilic little information is available about ethofumesate whereas fluridone is transported in the apoplast. Dinoseb and related phenols show limited movement in the apoplast, probably because they act primarily as contact herbicides causing... 

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