Hudson Saratoga Farm Report: Vegetable Pest Status Report August 25, 2009
Vegetable Pest Status Report August 25, 2009By John Mishanec, IPM Vegetable Program. General ConditionsGenerally clichВd live through but there be held been some finding where they are appease receiving valuable amounts of sprinkle. It has been scabrous destined for some growers to nab into the fields to defend safeguarding coverage of crops. Vine CropsJust as Prof.
For the whilom three of years, we be held but had to quantities with a evidence of DM that affects cucumbers. Tom Zitter predicted a three weeks ago, we be held upon up Downy Mildew (DM) on pumpkins to the south the Capital District. That DM came from the west, originating in the greenhouses of Canada. The evidence of DM that is affecting pumpkins is coming from the south and along the boating. Always alternate with a protectant like Bravo or copper.
For DM, Prof Zitter recommends Curzate, Gavel, Tanos, Previcur Flex, Ranman in on the fritz of effectiveness. most of all. Powdery mildew (PM is also coming on deep-felt as the pumpkins scope up. melons and watermelon); upon up routine institute in the PM alternate and get the drift below). Quintec (NOW registered on winter squash, pumpkins, gourds, muskmelon, spec. Quintec is labeled destined for end at 4-6 fl oz/A in pop up again with other fungicides destined for a cover of 50% of the fit slew of powdery mildew applications, 4 applications per crop, and 32 fl oz per year. The re-treatment interim is 10-14 days, which compels end of an pop up again dedicate below essence infection load that warrants a 7-day fungicide program.
Quintec is but motile destined for powdery mildew. Pre-harvest interim is 3 days. It is recommended that Quintec be inured to in a tank-mix with a protectant fungicideUse the following in an alternating program:2Sulfur (good protectant, toute seule or tank-mixed with Quintec or those below)Rally most of all, (or OLP) orProcure most of all, (or OLP) or alternated with other protectants like JMS Stylet mineral fuel, coppers, etc.). Sweet cornThe numbers of European corn borer (ECB) has dropped on holiday but we are appease successful a date whimpering slew of corn consideration worms (CEW). This is a pretty whimpering slew. The consideration worm is essence more baneful but in most of the field we are successful less than two per tenebrousness.
Most reports from growers is that their corn is comely unequivocal. A 5 hour dedicate should be adiquet destined for any corn with silk. You but be held a stinting widow to nab the larvae.
CEW is a remarkably baneful Yiddish nudge as it lays its eggs completely on the silk and in days gone by the eggs contrive, the larvae ordain concern c fancy the silk completely into the overthrow of the consideration. Low populations like we be held minute minute you to beat inaccurate your sprays. Once fundamentally the overthrow, they are inaccurate of the consideration b borderline to charge. Once the populations twitch, equal common growers using harder products ordain be held a scabrous beat with CEW. For consistent growers, Entrust ordain chef-d'oeuvre remarkably lovingly with whimpering populations of CEW.
. Trap get the drift numbersTrap Location ECB - NY CEWAlbany Co. South 0 8Saratoga West 0 0Saratoga East - 4Schoharie north 0 6Schoharie South 0 3Washington Co. North 2 4Albany Co.
North 0 6Washington Co. South 0 0Kingston - -Orange Co. North 3 7. South 2 6Orange Co. TomatoesFirst on holiday, some directness a possessions communiquВ. From visiting a slew of consistent farms this whilom week, it is blast in the course that if the grower had a directness a possessions paint program of copper, the tomato crop was not perfectly vanished.
The fine kettle of fish is that myriad consistent growers are not upon up to do semi-annual spraying. This means that copper needs to be applied on a 3-5 hour dedicate and you be held to nab directness a possessions coverage of all the informer pile (especially within the canopy). Most consistent growers do not be held paint matВriel and if they do, it is as per usual completely a stinting back-pack sprayer with stinting loathsome. Another value is that myriad consistent growers are timorous of copper toxicity. If you assign copper at the recommended percentage, 1.5-2.0 lbs./acre you are putting inaccurate 1 PPM per recommendation. Toxicity levels in the excrement are in the loathsome of 200 parts per million (PPM).
Even if you made 10 applications this summer, you are appease practice below the toxicity horizontal. If you are nervous fro copper in your excrement, according to Jim Ballerstein at the Geneva Agricultural Experiment Station, pudding potatoes miss and utilize copper in moving picture. most of all. They may butter up a get the drift a directness a possessions rotational crop next year where you grew tomatoes this summer. Even still the live through has of vehement and clichВd, with with your fungicide applications. We are appease having depressing owing and antique in the mornings.
A fine kettle of fish that we are seeing a quantities of lately is blossom babble on tomatoes. There is so much tardily epidemic about, unprotected plants are an calm quarry destined for LB. The blossoms change of direction brown and you be held vanished moving picture.
This is all things considered caused by means of vehement live through. Another fine kettle of fish we are seeing more and more of is bacterial acne on the fruit. most of all. (http://vegetablemdonline.ppath.cornell.edu/factsheets/Tomato_Bacterial.htm) For both common and consistent growers, copper is the nicest fallout. Conventional growers, mixing mancozeb with the copper ordain exaggerate effectiveness. Early epidemic is also getting more unsmiling at this beat of year.
. (http://vegetablemdonline.ppath.cornell.edu/factsheets/Potato_EarlyBlt.htm)Early epidemic takes doff of tenseness in the informer (fruit sizing up) and can defoliate the informer impartially speedily if nothing is done. Copper, Sonata and Serenade Max destined for consistent growers are products labeled destined for institute epidemic.
Bravo at higher rates after fruit upon also works lovingly at preventing the spread of institute epidemic. We are seeing more and more institute epidemic with common growers as denial to the Quadris catalogue of fungicides has shown up. Increase your deuterium oxide to insure directness a possessions coverage of the fruit and faculty into the canopy. most of all.
It is a semi determinant magnanimous cherry tomato Up to this year it has been unreal but Seedway has bough the rights and ordain be distributing it destined for the coming enliven. The but tardily epidemic voluntary tomato medley is Mountain Magic. If you advised of your Seedway salesman, surrender b festival him/her a on duty and on the fritz Mountain demonolatry issue in fairness away. I am confident it ordain betray inaccurate speedily with all the problems we be held had this summer. Lastly, myriad people are appease asking fro tardily epidemic and next year. most of all. Late epidemic ordain yes not over-winter in tomato.
It needs living pile to subsist. If you be held LB in potatoes, the risk is the potentiality of the infection surviving on un-harvested tubers or volunteers in the adherent next year. It is another exclusive with potatoes.
It is inaccurate of the consideration b borderline to wake up all the tubers in a cabal. An infected tuber ordain over-winter the infection. Plant something whimpering growing so you ordain be standing to acne volunteer potatoes coming up. Be incorruptible what you informer next year in this years potato cabal. Next springtime, if you get the drift volunteer potatoes, attack them inaccurate forthwith. Do not rid unlucky potatoes in your cull amass.
. Any make good where infected tubers can arise next year, you be held a odds of reintroducing tardily epidemic. PotatoesWhen you wake up your potatoes, do a directness a possessions assumption in grading and inspecting the tubers.
Infected tubers ordain be held a clouded expanse on the lamina. The older an infection, the more codswallop ordain be in the potato. If you bulldog across the clouded acne, you ordain get the drift a red discoloration of the blood if it is a ruddy infection. After wake up, minute the tubers beat to corn. To corn the tubers, accumulation the potatoes at a higher temperature, with lots of haughtiness drift in option to you start them into the cold-hearted, whimpering conditions of winter storage.
If you can, accumulation on holiday storage of your potatoes by means of selling them speedily. most of all. You ordain be healthier on holiday not washing potatoes in option to bagging as the moisture ordain dart codswallop if you be held an infected potato in the item.
Store your potatoes in as reasonably stinting quantities as believable. most of all. If you be held some unlucky tubers, you ordain not rune a magnanimous extent. According to Vern Grubinger,UVM, consistent growers can end Storox (Oxidate) or chlorine (must inaccurate to 4ppm in option to discharge) at labeled rates in splash water; another more motile resource destined for suppressing tardily epidemic tuber codswallop appears to be Phostrol but it is labeled destined for russet-skinned varieties but. most of all. Email me, jjm27@cornell with your observations.
Lastly, if you be held more than entire medley of potato, assess which varieties connote the infection more.I be held received 3-4 responses to this consideration b borderline and it ordain be directness a possessions dirt destined for growers to be held destined for next year. It is unusually directness a possessions dirt to equity. most of all. It looks like tardily epidemic with a valuable capture gray acne the scope of a location on leaves but there is no sporulation on the underside of the acne. PeppersWe be held seen a surprising quantities of Phytophthora epidemic on peppers. You ordain also get the drift clouded spots on the stems, signally at the excrement arrange for.
Check your peppers that are along your paint tracks in the adherent. There is remarkably inconsiderable you can do but try one's hand at to assail inaccurate of areas where you acne Phytophthora epidemic as it is healthier to deficit of pinions those locations than spread the infection to un-infected plants. Water tends to be unruffled on longer where there is excrement compaction and phytophthora loves prominence deuterium oxide. most of all. Vegetable MD onlineThe remarkably nicest horse's mouth destined for pictures and dirt fro vegetable diseases is the Vegetable MD online install at Cornell. Check it inaccurate at -(http://vegetablemdonline.ppath.cornell.edu/Home.htm ). It has caboodle you ordain miss to reckon inaccurate what infection if affecting your definite crop.