Abstract
The effect of four commonly used pesticides, triadlmefon, jingganmycin, triazoplos and imidacloprid, on graingrowth parameters during rice grain filling was examined using growth equation in the present experiment. Two hundreds ofspike without damage by pests were simultaneously marked per plot during heading stage of rice. Rice plants were sprayed at 1day after marking. Thereafter, 20 spikes were sampled at 4 days interval and dried at oven. Then, 10 superior and inferior grainswere picked per spike, and brown rice was weighed after shelling, respectively. First, second and third order derivates werededuced from the following grain growth formula:e1+-=btaKW Where W was the weight of 100- grain brown rice at t time, K wasmaximum of grain growth, a and b were parameters of the formula. The parameters were calculated as follows:+=e12e0aKbaR,△t=t2-t1, ()()12max124ttttVbKGT--==,4maxbKV=Where R0, △t, GT and Vmax were initial growth power, active growth stage, cumulative weight of dried content during△t and maximum growth rate, respectively. The result showed that GT and K of superior grain following spraying ofimidacloprid at the active ingredient rate of 22.5gha-1 and 45gha-1 reduced significantly, and △t significantly decreasedin jingganmycin treatments at the active ingredient rates of 45gha-1 and 225gha-1. In addition, high dose of imidaclopridsignificantly reduced the weight of 1000-grain by 9.77%. However, there was no significant difference between high doseof jingganmycin and control in 1000-grain weight, indicating effective duration of jingganmycin on grain filling was shorterthan that of imidacloprid.
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Claims 6
Claim · model-written summary
Imidacloprid at both rates significantly reduced superior grain GT.
- Taxon
- Rice
Oryza sativat0 - Treatment
- imidacloprid at the active ingredient rate of 22.5gha-1 and 45gha-1e0
- Outcome
- GTe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GT and K of superior grain following spraying ofimidacloprid at the active ingredient rate of 22.5gha-1 and 45gha-1 reduced significantly”
t0“Rice”
Claim · model-written summary
Imidacloprid at both rates significantly reduced superior grain K.
- Taxon
- RiceOryza sativat0
- Treatment
- imidacloprid at the active ingredient rate of 22.5gha-1 and 45gha-1e0
- Outcome
- K of superior graine0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GT and K of superior grain following spraying ofimidacloprid at the active ingredient rate of 22.5gha-1 and 45gha-1 reduced significantly”
t0“Rice”
Claim · model-written summary
Jingganmycin at both rates significantly shortened active grain growth stage.
- Taxon
- RiceOryza sativat0
- Treatment
- jingganmycin treatments at the active ingredient rates of 45gha-1 and 225gha-1e0
- Outcome
- △te0
- Direction
- decreasedine0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“△t significantly decreasedin jingganmycin treatments at the active ingredient rates of 45gha-1 and 225gha-1”
t0“Rice”
Claim · model-written summary
High-dose imidacloprid reduced 1000-grain weight by 9.77%.
- Taxon
- RiceOryza sativat0
- Treatment
- high dose of imidaclopride0
- Outcome
- weight of 1000-graine0
- Direction
- reducede0
- Value
- 9.77%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high dose of imidaclopridsignificantly reduced the weight of 1000-grain by 9.77%”
t0“Rice”
Claim · model-written summary
High-dose jingganmycin did not differ significantly from control in 1000-grain weight.
- Taxon
- RiceOryza sativat0
- Treatment
- high doseof jingganmycine0
- Outcome
- 1000-grain weighte0
- Direction
- no significant differencee0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant difference between high doseof jingganmycin and control in 1000-grain weight”
t0“Rice”
Claim · model-written summary
The authors inferred that jingganmycin affected grain filling for a shorter time than imidacloprid.
- Taxon
- RiceOryza sativat0
- Treatment
- jingganmycine0
- Outcome
- effective duration of jingganmycin on grain fillinge0
- Direction
- shorterthane0
- Comparator
- imidaclopride0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effective duration of jingganmycin on grain filling was shorterthan that of imidacloprid”
t0“Rice”
The same questions in other papers
imidacloprid · yield · Oryza sativa (rice)Positive and negative results
22 in the opposite direction
- positive
- positive
- positive
19 papers more in this group
See all 23 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.