Abstract
In studies over a five-year period, the development of abnormal growth formerly included under “grape bud mite injury,” was found to be correlated with the effects of pruning time upon time of leafing of spurpruned vines. Pruning times (e.g., early January) that resulted in early leafing were followed by abnormal growth in early season and resulted in a 39 per cent reduction in yield over a five-year period. The effect of time of pruning upon abnormal growth occurs in the absence of bud mites, a bud-inhabiting strain of Eriophyes vitis (Pgst.). Pruning times (e.g., late March) that resulted in late leafing were followed by virtually normal growth and normal yields. Such pruning-time responses have been observed in Mataro, Muscat of Alexandria, and Malaga grape vineyards subject to abnormal growth. On Mataro vines, the period in winter in southern California during which buds responded to a nearby pruning wound by leafing very early and developing severe abnormal growth usually began about mid-December and extended through mid-January and, in some years, through the first part of February. Evidence is presented which indicates that this abnormal growth is caused by a temporary early-season deficiency of boron. Soil applications of borax were followed by alleviation of symptoms, increased yield, and elevation of boron level in leaves above the deficiency range. It is not inferred that these results show that grape bud mites can cause no injury. It is not known whether such pruning-time responses are in all cases related to temporary early-season boron deficiency, but this appears to be an excellent working hypothesis. Since pruning time responses have been recorded in northern California vineyards subject to “bud mite injury,” this suggests that this abnormal growth be re-investigated in the light of the possibility of temporary early-season boron deficiency as a causal factor.
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Claims 12
Claim · model-written summary
Abnormal growth in grape vines correlated with pruning effects on leafing time.
Not reportedDirection
Verbatim
e0“the development of abnormal growth formerly included under “grape bud mite injury,” was found to be correlated with the effects of pruning time upon time of leafing of spurpruned vines”
t0“grapes”
Claim · model-written summary
Early January pruning followed by early leafing was associated with abnormal early-season growth.
Not reportedDirection
Verbatim
e0“Pruning times (e.g., early January) that resulted in early leafing were followed by abnormal growth in early season”
t0“grapes”
Claim · model-written summary
Early January pruning reduced grape yield by 39 per cent over five years.
Not reportedComparator
Verbatim
e0“Pruning times (e.g., early January) that resulted in early leafing were followed by abnormal growth in early season and resulted in a 39 per cent reduction in yield over a five-year period”
t0“grapes”
Claim · model-written summary
The pruning-time effect on abnormal growth occurred without grape bud mites.
Verbatim
e0“The effect of time of pruning upon abnormal growth occurs in the absence of bud mites, a bud-inhabiting strain of Eriophyes vitis (Pgst.)”
t0“grapes”
Claim · model-written summary
Late March pruning was followed by virtually normal growth.
Not reportedComparatorDirection
Verbatim
e0“Pruning times (e.g., late March) that resulted in late leafing were followed by virtually normal growth and normal yields”
t0“grapes”
Claim · model-written summary
Late March pruning was followed by normal yields.
Not reportedComparatorDirection
Verbatim
e0“Pruning times (e.g., late March) that resulted in late leafing were followed by virtually normal growth and normal yields”
t0“grapes”
Claim · model-written summary
Mataro buds near a pruning wound leafed very early and developed severe abnormal growth during a winter response period.
Verbatim
e0“On Mataro vines, the period in winter in southern California during which buds responded to a nearby pruning wound by leafing very early and developing severe abnormal growth usually began about mid-December and extended through mid-January and, in some years, through the first part of February”
t0“grapes”
Claim · model-written summary
The authors attribute abnormal growth to a temporary early-season boron deficiency.
Verbatim
e0“Evidence is presented which indicates that this abnormal growth is caused by a temporary early-season deficiency of boron”
t0“grapes”
Claim · model-written summary
Soil borax applications alleviated grape symptoms.
Not reportedComparator
Verbatim
e0“Soil applications of borax were followed by alleviation of symptoms, increased yield, and elevation of boron level in leaves above the deficiency range”
t0“grapes”
Claim · model-written summary
Soil borax applications increased grape yield.
Not reportedComparator
Verbatim
e0“Soil applications of borax were followed by alleviation of symptoms, increased yield, and elevation of boron level in leaves above the deficiency range”
t0“grapes”
Claim · model-written summary
Soil borax applications elevated boron in grape leaves above the deficiency range.
Verbatim
e0“Soil applications of borax were followed by alleviation of symptoms, increased yield, and elevation of boron level in leaves above the deficiency range”
t0“grapes”
Claim · model-written summary
The authors recommend reinvestigating abnormal growth attributed to bud mites for temporary boron deficiency.
Verbatim
e0“this suggests that this abnormal growth be re-investigated in the light of the possibility of temporary early-season boron deficiency as a causal factor”
t0“grapes”
The same questions in other papers
borax · yield · VitisResults agree
1 paper in the same direction as this paper
- positive
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.