* Palm falls to 6-week low on China, Greek crisis

* China stocks tumble as regulator warns of "panic"

(Updates with midday close)

By Naveen Thukral

SINGAPORE, July 8 (Reuters) - Malaysian palm oil futures slid for a third consecutive session

on Wednesday, falling 3 percent to a six-week low as Chinese stocks tumbled and the Greek debt

crisis continued to hammer markets.

Asian shares fell and the safe-haven yen rallied as Chinese stocks remained in a tailspin,

shaking investors already rattled by Greece's debt crisis.

"It all started with Greece and now markets across Asia are taking a hit," said one Kuala

Lumpur-based palm oil trader.

"Chinese commodity markets, including rubber and metals, are falling sharply which is impacting

palm oil."

The September palm oil contract on the Bursa Malaysia Derivatives exchange dropped 3

percent, or 67 ringgit, to 2,142 ringgit ($563.7) a tonne by the midday break.

Chinese stocks dived after the securities regulator said the tumbling stock market in the

world's second-biggest economy was in the grip of "panic sentiment" as investors ignored a battery

of support measures from Beijing.

Soybean futures on the Dalian Commodity Exchange slid to their lowest since August

2013 and soybean oil lost 4 percent to its lowest since mid-March.

Traded volume stood at 26,437 lots of 25 tonnes each, sharply higher than the average 12,500

lots traded in the first half of the session.

Investors in the palm oil market are expecting the Malaysian Palm Oil Board to report later

this week that the country's palm oil production in June declined by 1.5 to 2 percent from a month

earlier. That could bring down stockpiles as exports have been rising.

Exports of Malaysian palm oil products for June rose 9.4 percent to 1,696,096 tonnes, compared

with 1,550,675 tonnes shipped in May, cargo surveyor Societe Generale de Surveillance said.

Palm oil is expected to seek support around 2,139 ringgit per tonne and then either hover

around this level or rebound moderately, according to Wang Tao, a Reuters market analyst for

commodities technicals.

The support is provided by the 76.4 percent Fibonacci retracement on the uptrend from the April

29 low of 2,070 ringgit to the June 8 high of 2,362 ringgit.

($1 = 3.8060 ringgit)

Palm, soy and crude oil prices at 0431 GMT

Contract Month Last Change Low High Volume

MY PALM OIL JUL5 0 +0.00 2149 0 0

MY PALM OIL AUG5 2137 -67.00 2133 2158 2348

MY PALM OIL SEP5 2142 -67.00 2135 2155 14740

CHINA PALM OLEIN JAN6 4774 -198.00 4774 4920 468654

CHINA SOYOIL JAN6 5474 -228.00 5474 5654 452012

CBOT SOY OIL DEC5 31.70 -2.10 31.66 32.02 3876

INDIA PALM OIL JUL5 426.70 -2.10 426.00 426.70 8

INDIA SOYOIL AUG5 569.45 -1.40 568.10 570.20 1335

NYMEX CRUDE AUG5 52.08 -0.26 51.87 52.96 12581

Palm oil prices in Malaysian ringgit per tonne

CBOT soy oil in U.S. cents per pound

Dalian soy oil and RBD palm olein in Chinese yuan per tonne

India soy oil in Indian rupee per 10 kg

Crude in U.S. dollars per barrel