- Author: Kathy Keatley Garvey
In the blink of an eye...
There it was, nestled inside a baby blue eyes blossom, Nemophila menziesii, which is a spring-blooming plant native to California, Oregon and Baja California.
"It?" A katydid nymph, a wingless critter with long black-and-white banded antennae.
The UC Statewide Integrated Pest Management Program (UC IPM) tells us that "nymphs appear in April and May and take 2 to 3 months to mature through 6 to 8 instars."
"At least 74 species of katydids (family Tettigoniidae) are present in California," according to UC IPM. "Most are not pests because they chew only a small amount of foliage before moving to another plant. Forktailed bush katydid (Scudderia furcata) can be a pest because it chews young fruit in addition to leaves. Angularwinged katydid (Microcentrum retinerve) and broadwinged katydid (Microcentrum rhombifolium) are other common species.--UC IPM post on katydids.
This nymph crawled around the blossom, stretched to reach the next one, and then, up and over it went.
Just a day in the life of katydid nymph on baby blue eyes.
- Author: Neil McRoberts
General Situation After the wet winter and extended cool spring, the annual summer weather pattern finally seems to have established itself. Temperatures for the next 10 days will see daily maximum values in the low 80's F, reaching the low 90's by the first few days of June. Planting has been happening rapidly over the last 2-3 weeks and crops will pull away quickly with settled warm conditions.
Thrips and TSWV So far, thrips numbers have been low and we are not hearing reports of TSWV so far in this area This is all good, but we are concerned that the late planting times will mean that the pre-flowiering high risk period for TSWV will be extended this year. We are predicting that Generation 3 adults will peak around June 13 and Generation 4 adults will peak around July 5. Given the slow start and low leves of TSWV so far, unless there is a local source of TSWV, Generation 4 seems the more likely source for any significant chance for TSWV to spread around, and the more likely to pay off in terms of investment in thrips control. Contact your local UCCE adviser if you want to discuss options specific to your situation.
Resistance breaking TSWV Remember reistance breaking strains of TSWV are now widespread in the San Joaquin Valley, so varieties carrying the SW-5 resistance won't necessarily stand up on their own without thrips management if there are local sources of TSWV. At locations with a history of TSWV it's probably better to treat SW-5 varieties the same way as varieties without the resistance gene.
- Author: Neil McRoberts
General Situation After the wet winter and extended cool spring, the annual summer weather pattern finally seems to have established itself. Temperatures for the next 10 days will see daily maximum values in the mid 70's to mid 80's F, reaching 90F by the first few days of June. Planting has been happening rapidly over the last 2-3 weeks and crops will pull away quickly with settled warm conditions.
Thrips and TSWV So far, thrips numbers have been low and we are not hearing reports of TSWV so far in this area This is all good, but we are concerned that the late planting times will mean that the pre-flowiering high risk period for TSWV will be extended this year. We are predicting that Generation 3 adults will peak around June 5 and Generation 4 adults will peak around June 27. Given the slow start and low leves of TSWV so far, unless there is a local source of TSWV, Generation 4 seems the more likely source for any significant chance for TSWV to spread around, and the more likely to pay off in terms of investment in thrips control. Contact your local UCCE adviser if you want to discuss options specific to your situation.
Resistance breaking TSWV Remember reistance breaking strains of TSWV are now widespread in the San Joaquin Valley, so varieties carrying the SW-5 resistance won't necessarily stand up on their own without thrips management if there are local sources of TSWV. At locations with a history of TSWV it's probably better to treat SW-5 varieties the same way as varieties without the resistance gene.
