310 FIFTH STREET, COLUSA, CA 95932    •    (530) 458-4141
NEWSPAPER PUBLISHED WEDNESDAY • WEBSITE UPDATED THURSDAY

Home Master Gardener's Gardening corner: Tomato disease and insect problems

Gardening corner: Tomato disease and insect problems

Blossom End Rot usually occurs in the spring. It is caused by a calcium deficiency but it does not mean calcium is deficient in your soil. It is actually caused by inconsistent soil moisture. To solve the problem, keep your soil evenly moist. Mulch can help.

Flower drop and a failure to set fruit is usually caused by night temperatures being too high or too low or excessive nitrogen fertilizer. To solve the problem, avoid excessive fertilizer, possibly use hormone sprays or tap on blossoms stems 3 times a week to help fruit set.

Fruit cracks are caused by fast fruit growth because of high temperatures and high soil moisture levels. You cannot do anything thing about high temperatures but over watering does cause fruit cracks.

Both Fusarium and Verticillium wilt cause leaf yellowing and discoloration of the water-conducting tissues of the plant. Cut affected plants at the base of stems and examine them in cross section to see the browning of the water-conducting tissue compared to the healthy ivory of uninfected plants. Verticillium and Fusarium discoloration are extremely difficult to distinguish, although Fusarium discoloration tends to be darker. Fusarium tends to occur more in warmer soils and Verticillium in cooler ones. Management for both requires resistant varieties.

Tomato hornworms are likely to be the largest caterpillars you see in the vegetable garden. Their striping pattern makes them hard to spot despite their size. Note the horn or thorn at the rear end. Large, black or green droppings on the ground beneath tomato plants usually indicate the presence of hornworms. Adult moths have a wingspan up to 5 inches.

Damage by hornworm larvae is usually most common in midsummer, but there may also be a small population peak of larvae in the late summer. Entire leaves and small stems may be consumed. Large pieces from green fruit may also be chewed.

Handpick or snip hornworms with shears. Natural enemies normally keep populations under control. Rototilling after harvest destroys pupae in soil and prevents adults from developing. Visit ipm.ucanr.edu or cecolusa.ucanr.edu more information.

For more gardening advice or topics from the Colusa County Master Gardeners, visit http://cecolusa.ucanr.edu

Avatar
UCCE Colusa County Master Gardenershttp://cecolusa.ucanr.edu/Master_Gardeners/
The Master Gardeners of Colusa County can be contacted by: - Email us at glhernandez@ucanr.edu - Call us at 530-458-0570 - Visit us at our plant clinics, farmers markets, Colusa County Fair and at other county events - Visit us at our office, 100 Sunrise Blvd., Ste. E, Colusa, Ca 95932, our office hours are, Tuesdays 9am to 12:00 and 1pm to 4:00

Recent News

Colusa County Free Library Opens for Curbside Services

On Wednesday, May 20, the Colusa County Free Library began offering curbside pickup of library materials placed on hold via the library’s online portal....

Local Government

Williams hit hard by economic downturn

COVID-19 is expected to take a tremendous economic toll in Williams, whose revenue from Interstate-5 commerce is the highest in Colusa County. Finance Director Rex...

Bridge Street work on schedule

Work continues along a mile-long stretch of Bridge Street that is part of a $19.5 million Caltrans roadway rehabilitation project. The project that got underway...

Public & Legal Notices

County of Colusa – Groundwater Commission Notice of Public Hearing

  COUNTY OF COLUSA GROUNDWATER COMMISSION NOTICE OF PUBLIC HEARING   NOTICE IS HEREBY GIVEN THAT the Colusa County Groundwater Commission will hold a Public Hearing for the purpose...

Notice of Vacancy – Princeton Water Works District

NOTICE OF VACANCY NOTICE IS HEREBY GIVEN THAT the Colusa County Board of Supervisors is soliciting applications to fill a vacancy for an unexpired term...

County of Colusa – Notice of Adoption of a Resolution of Intent to Temporarily Sell and Transfer Central Valley Water Project Rights for the...

COUNTY OF COLUSA NOTICE OF ADOPTION BY THE COLUSA COUNTY BOARD OF SUPERVISORS OF A RESOLUTION OF INTENT TO TEMPORARILY SELL AND TRANSFER CENTRAL VALLEY...

FBN – Superior Tire Service

FICTITIOUS BUSINESS NAME STATEMENT FILE NO. 2020-0000039 Date filed: APRIL 30, 2020 The following persons are doing business as:   SUPERIOR TIRE SERVICE BUSINESS ADDRESS: 247 BRIDGE STREET, COLUSA, CA...

Colusa County Board of Supervisors – Notice of Public Hearing

  COLUSA COUNTY BOARD OF SUPERVISORS NOTICE OF PUBLIC HEARING NOTICE IS HEREBY GIVEN THAT the Colusa County Board of Supervisors will conduct a Public Hearing on...