Weather Forecast Based Grape Advisory

Weather forecast based pest advisory for April 23-30, 2014

Growth Stage (Days after foundation pruning)

Likely Pest Risk

Thrips

Mites

Caterpillars

Mealybugs

Jassids

20-30 days

Moderate to high

Nil

Less

Moderate to High

Less

 

  If thrips infestation is noticed then application of fipronil 80WG @0.05 g per liter or emamectin benzoate 5 SG @ 0.22 g/ liter of water is effective. Flea beetles may cause damage to new buds at this stage and a preventive spray of imidacloprid 17.8 SL @ 0.30 ml per liter water can be given at swollen bud or bud sprouting stage. For the management of mealybugs, spot application of Methomyl 40 SP @ 1.0 g/L or Buprofezin 25 SC @ 1.25 ml/L water can be given.

       Two species of stem borer, Celosterna scabrator and Stromatium barbatum were noticed in vineyards. Both species of stem borer are either under active feeding stage (grub), pupal stage of its life cycle during this period. Few of them may also be turning into adult beetles which will remain hidden until May-Hune first rainfall. Those farmers who are uprooting the old vineyards for fresh planting, should ensure that the woods are disposed off by burning before rainy season. Otherwise, during rainy season the adults of stem borer will lay eggs and spread infestation to other vineyards. Presently, no control measure can be initiated against Stromatium barbatum, however, for the control of Celosterna scabrator, a biological named Metarhizium anisopliae @ 100 ml/L water can be injected into live galleries made by Celosterna scabrator grubs.

 

Disclaimer: The bio-efficacy of insecticides mentioned above is based on the experiments conducted by NRCG. Their use by the farmers is restricted to their CIBRC label claim for various crops.

Advisory for irrigation in hail storm affected vineyards

गारपीटग्रस्त द्राक्षबागामध्ये पाण्याच्या वापरासंदर्भात सल्ला

Advisory based on monitoring of pesticide residue

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Advisory for irrigation in hailstorm affected vineyards

In most of the hailstorm affected vineyards defoliation has taken place. As a result of this the vines are being exposed to direct sunlight. Exposure of vines to direct sunlight under such conditions will lead to drying of permanent vine parts.  Further there has been sever injuries on vine parts and exposure to direct sunlight will further aggravate the problem of drying of arms etc.  and uneven bud break. Hence growers were advised to prune the vineyards early to reduce duration of the exposure to direct sunlight for longer duration.  The pan evaporation in these areas usually ranges from 7 to 8 mm/ day. Accordingly the irrigation requirement in the vineyards will range from 29400 to 33600 liters/ha/ day respectively. Since the vineyards in the affected regions are located in hotter area where the summer temperature goes beyond 40o C and there is scarcity of  irrigation water in these areas to  economies the irrigation water mulching should be used. It is also advised not to apply fertilizer in large doses as this may increase the root zone salinity. Hence fertilisers should be applied  in splits via irrigation water (fertigation).

गारपीटग्रस्त द्राक्षबागामध्ये पाण्याच्या वापरासंदर्भात सल्ला

गारपीट झालेल्या बहुतांश द्राक्षबागामध्ये पानग झालेली आहे आणि पानग झाल्यामुळे बागा थेट सूर्यप्रकाशामध्ये आलेल्या आहेत. बागा थेट सूर्यप्रकाशामध्ये आल्यामुळे झाडांच्या वेलींचे प्रमुख भाग कायमस्वरूपी वाण्याची शक्यता असते. तसेच गारपीट झाल्यामुळे झाडावरती खोल जखमा झालेल्या आहेत. झाडांना झालेल्या जखमा व थेट सूर्यप्रकाश यामुळे वेलींच्या मुख्य फांदया वाण्याची तसेच त्यावर एकसारख्या फूटी न निघण्याची समस्या वाढते. ह्या गोष्टी टाण्यासाठी शेतकऱ्यांनी आपल्या बागांची खरड़ छाटनी लवकरात लवकर घ्यावी, जेणेकरुन बागा थेट सूर्यप्रकाशामध्ये जास्त वे राहणार नाहीत. साधारणपणे गारपीट झालेल्या भागात पैन बाष्पिभवनाचा दर दिवसाला ७ ८ मिमी असा आहे. हयावरून असे दिसून येते की बागेमध्ये दिवसाला दर हेक्टरी २९,४०० ३३,६०० लि. पाण्याची जरूरी भासेल. गारपीट झालेल्या बहुतांश बागामध्ये उन्हायाचे तापमान ४० से. च्या वरती जाते, तसेच ह्या भागामध्ये पाण्याची पण कमतरता आहे, म्हणून बागेमध्ये पानी जास्त वे टिकुन राहण्यासाठी मल्चींग करणे गरजेचे आहे. खतांचा डोस जास्त प्रमाणात वापरल्यास झाडांच्या मुӀजव क्षारांचे प्रमाण वाढण्याची शक्यता असते. हे टाण्यासाठी खतांचा वापर टप्प्या-टप्प्याने विभागून करावा व शक्यतो खते ठिबक सिंचनाद्वारे पाण्यातुन घ्यावी.

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Advisory based on monitoring of pesticide residue

Status of Nation-wide pesticide residue monitoring in table grapes as on: 27/03/2014

No of samples analyzed

6828

No of Alerts issued

1074

No of Alerts revoked

177

No of effective alerts

897

% of failure of samples

13.1%

Major pesticides detected in 2014

* 4-bromo-2-chlorophenol (metabolite of Profenophos)

Abamectin

Hexaconazole

Chlormequat Chloride

Flusilazole

Chlorfenapyr

 

Since more than 50% of the samples failed so far are due to the detection of the non-recommended insecticide profenophos and its metabolite, the growers are advised to strictly adhere to the package of practices recommended by this institute in terms of pre-harvest interval (PHI) to minimize pesticide residue detections in grapes at harvest.

 

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